Glossary
List of Terms
Absolute coordinates
See Coordinates
      Alignment axis
Axis around which you can rotate a component using the Orient tool.
      Anchor in Detail views
A point used as the starting point for scaling.
      Anchor in Move tool
The center ball of the Move handle. You can drag the center ball or use the
            Anchor tool guide to place the anchor on a solid, face, edge, vertex, or
            origin.
      Anchor in Patterns
A member of a linear or rotational pattern that does not move with the pattern.
            You can anchor one or more pattern members using the Fulcrum tool guide.
      Anchor point
See Anchor
      Angular reference
Starting point for dimensioning an angle.
      Angular ruler dimension
See Ruler dimensions
      Annotation
Information you can add to a drawing, such as notes, dimensions, geometric
            tolerances, center marks, and Bills of Materials.
      Annotation plane
Plane on which you can annotate designs and drawing sheets. Use the
            Create Note tool to select an annotation plane and enter text onto the plane.
      Arc
Curved line of constant radius; part of a circle. See Sweep arc, Three point arc,
            Tangent arc.
      ASME
American Society of Mechanical Engineers standards for engineering drawing
            practices. You can customize the style of your annotations to conform to ASME standards.
            See ISO, JIS
      Aspect ratio
Ratio of the length to width of a rectangle or the height to width of an image.
            When resizing images, it can be important to maintain the aspect ratio to avoid
            distortion.
      Assembly
Hierarchy of components and subcomponents showing relationship within a design,
            as shown in the Structure tree. In manufacturing, a unit fitted together from
            manufactured parts. See Assembly tool, Component
      Assembly tool
Use the Assembly tools to specify how components are aligned with each other,
            that is, create a mating condition. You can Align, Center, and Orient
            components.
      Association
Relationship between objects that enables you to edit them together. For example,
            when you pull a polygon into 3D, the faces acquire a polygon relationship. If you act on
            one face or edge, it affects all the faces in the polygon. Another example of an
            association is a mirror plane between two faces. See Mirror, Remove
            associations
      AutoCAD
Software application for 2D and 3D design and drafting by Autodesk, Inc.
            AutoCAD's native file format is DWG, its interchange file format is DXF, and its format
            for publishing CAD data is DWF.
      Axial face
Face of a 3D object through which an axis extends. The axis displays when you
            move the cursor over the axial face.
      Axis
Straight line that an object rotates around or that objects are regularly
            arranged around. See Alignment axis.
      Balloon
Annotation consisting of content from the Bill of Materials. Balloon notes update
            when changes are made to the BOM table.
      Baseline faces
See Offset baseline faces
      Bend deduction table
CSV (comma-separated value) file used to calculate the developed lengths for
            unfolded or flat patterns to be machined.
      Bill of Materials (BOM)
Table of components, sub-components, parts, and materials needed to manufacture a
            finished product.
      Blend
Smooth and tangent transition between faces or edges; created using the Pull
            tool.
      Blend plane
Sections that appears when you edit a face as a blend using the Edit as Blend
            tool. You can create, move, and orient blend planes.
      Blend surface
Faces you can edit using the Edit as Blend tool. If the face was originally
            created as a blend, the original blend surfaces are available for editing. If the face
            is not blended, the tool first converts the face to a blended surface.
      Blended face
Face created by blending between two edges.
      Body
A solid or surface.
      Bounded line
Segment of a line bounded by one of more intersections with lines or edges. Use
            the Trim Away tool to delete a bounded line.
      Chamfer
Sloping corner between two edges created using the Pull tool; angle with equal
            setback; bevel.
      Chord
Straight line with both end points on a circle.
      Chord angle
Degrees of a circle delineated by a chord. In a Swept arc, the starting point and
            end point of the arc define the chord.
      Clip
Hide all geometry in a design above or below the grid or selected
            plane.
      Closed lines
Intersecting lines that enclose an area to form a region when you sketch shapes
            in 2D. The regions will become solids and the lines become edges when you pull your
            sketch into 3D.
      Closed loop
Contiguous sketched lines or edges. Can be selected by double-clicking one of the
            edges or lines.
      Coaxial
Relationship between faces that share the same center of rotation. If you check
            the Coaxial Face Groups box in the Display tab, faces that share an axis are indicated
            with blue shading.
      Combine
A tool used to cut or glue geometry together.
      Component
Object in a design, including the top-level design component. Each component
            consists of any number of objects, such as solids and surfaces, and can contain
            sub-components. You can think of a component as a "part." Components can be saved as a
            separate file. An external component is another design inserted as a component of your
            design. Making the component internal prevents changes from being made to the external
            component file. You can also create an external component by saving a component as a
            separate file. See Lightweight components, Assembly
      Constant-radius round
Default configuration for a fillet. The radius of the rounded corner is uniform
            across the length of the line or edge. See Fillet, Variable radius round
      Construction line
Shape drawn with a Sketch tool to help you create an accurate sketch.
            Construction lines become axes in 3D. They are also useful for creating
            mirrors.
      Context menu
In the user interface, a list of functions specific to the operation that you are
            performing. Access the context menu by right-clicking in the design window.
      Converging lines
Non-parallel lines. With the Dimension tool, you can annotate converging lines at
            a virtual sharp.
      Coordinates - Absolute
Method of inputting points based on distance and angle. Absolute coordinates are
            measured from the origin (x and y for 2D and x, y, z for 3D).
      Coordinates - Polar
Method of inputting points based on distance and angle. Polar coordinates are
            measured by entering values for distance and angle.
      Coordinates - Relative
Method of inputting points based on distance and angle. Relative coordinates are
            measured from the selected point (x and y for 2D and x, y, z for 3D).
      Corner
See Fillet (interior corner) or Round (exterior corner)
      Cross-section mode
Mode used to edit solids by working with their edges and vertices in
            cross-section. In this mode, pulling a line pulls a face, and pulling a vertex pulls an
            edge. To create a cross-section view, you select the face that will be used to set the
            cross-section plane. Hatching is used to show the intersection of the cross-section
            plane and a solid.
      Cross-section view
One of the view selections for drawing sheets. Cross-section view shows a
            cross-section through your design. You create a cross-section view from one of the other
            views on the drawing sheet. See General view, Projected view, and Detail
            view.
      Curvature
Analysis tool that displays a fringe graph or color shading to represent the
            curvature along curves or edges. Values indicate how curvy or "swoopy" the curve or
            surface is at each point.
      Curve
In 3D, any line in space.
      Curve center
A small cross that appears on the sketch grid at the center of a circle, ellipse,
            polygon, or arc.
      Curved slot
A slot created by pulling a hole along the axis of a driving cylinder. A 360
            degree curved slot is a round cut. See Radial slot.
      Cutter object
When using the Combine tool to split a solid or surface, the Cutter object is the
            solid or surface you use to cut the target. Use the Select Cutter tool guide to select
            the Cutter object.
      Cylindrical face
The surface of a cylinder, formed by points at a fixed distance from the axis of
            the cylinder.
      Datum
Object that is assumed to be an exact size and shape, and be in an exact
            location, that is used to locate or establish geometric relationship of other
            objects.
      Datum symbol
Symbol attached to a point, axis, or plane that must be referenced for machining
            and inspection.
      Design
2D or 3D model that contains at least one top-level component.
      Design component
See component
      Design window
Area in the user interface that displays your model or assembly. Also known as
            Workspace.
      Detach
Create separate surfaces from individual pieces of a sketch, or objects or faces
            in 3D. You can detach protrusions to move them with the Move tool's Detach First
            option.
      Detail
Aspects of a design incorporated to communicate with others or submit the design
            for review. Use the tools on the Detailing tab to annotate designs, create drawing
            sheets, and review design changes. You can customize detailing settings to conform to
            standards or create your own custom style.
      Detail view
One of the view selections for drawing sheets. Detail view creates an enlarged
            view of a particular area, magnifying a portion to show more detail. You create a
            detailed view from one of the other views on the drawing sheet. See General view,
            Projected view, and Cross-section view.
      Dimension
Annotation on a drawing showing measurement of an edge or face. Use the Dimension
            tool to add measurements to your design or drawing sheet.
      Dimensional sketching
Precise sketching by entering measurement values for the current line or relative
            to other lines and points. See Dimensions.
      Dimensions
Values or expressions you enter for precise control during the creation or
            modification of a design. You can dimension every element, from lines in sketches to
            faces of solids. See Ordinate dimensions, Progressive dimensions, Ruler
            dimension.
      Document
A model file (.rsdoc) that may contain any combination of design versions,
           and associated drawing sheets.
      Draft
Angle or taper on an object that facilitates removal from a mold or die. You
            draft by pulling one or more faces around about another face that you selected as the
            pivot. You can add or cut material as you pull.
      Draft faces
See Draft
      Driving cylinder
Shape used when pulling a hole to create a curved or radial slot. You select the
            face or axis of the driving cylinder to guide the shape of the slot.
      Driving dimension
Ruler dimension created with the Move, Pull, or Select tool and saved within a
            group.
      Driving edge
Edge you select to drive the change when using the Pull tool. Select a driving
            edge for revolves, directed extrusions, sweeps, and drafts. The driving edge is shown in
            blue.
      Driving face
Face you select to drive the change when using the Pull tool. Select a driving
            face for revolves, directed extrusions, sweeps, and drafts. The driving face is shown in
            blue.
      DWG
AutoCAD native drawing format. You can open and insert drawings, parts, and
            assemblies. Drawings can be inserted as layouts. You can export parts, assemblies,
            and drawing sheets.
      DXF
Drawing Interchange Format or Drawing Exchange Format. CAD data file format
            developed by Autodesk for enabling data interoperability between AutoCAD and other
            programs. You can open and insert drawings, parts, and assemblies.Drawings can be
            inserted as layouts. You can export parts, assemblies, and drawing sheets.
      Eccentric
Not sharing the same center.
      Edge
3D object composed of a single outside boundary of a feature. A line sketched in
            2D becomes an edge when you pull your sketch into 3D.
      Edge chain
Tangent chain; a continual series of edges that are connected edge-to-edge.
            Double-clicking an edge in the chain selects the entire chain.
      Edge loop
All of the edges around a face; a continual series of edges that are connected
            edge-to-edge forming a closed loop. Double-clicking an edge in the loop selects the
            entire loop.
      Edge tangency
When you blend between two faces, the blend surface begins tangent to the edges
            of the initial faces and ends tangent to the edges of the end faces. By deciding which
            edges you do not want to use for tangency, you can create a blend with or without the
            effects of the edges.
      Edit faces as a blend
Using the Edit as Blend tool to move or orient blend planes to edit a face as a
            blend. See Blend plane, Blend surface.
      Ellipse
Geometric shape described as a circle viewed at an angle; oval with two centers
            of equal radius.
      Entity
Term used to refer to any object in a 2D sketch or 3D drawing.
      Exploded assembly
View of components in which objects are shown along an axis line.
      Extents
The outer boundaries of the objects you have drawn.
      Extrude
To pull a face along with its edges. The edges extend to bound the extruded face,
            creating a new section defined by the edges.
      Face
Side or other surface of a solid. Some examples are the inside surface of a hole
            or the six sides of a rectangular solid. See Surface.
      Face grid
Horizontal and vertical lines, displayed using the Face Grid tool, that define
            any face or surface you select in your design.
      Face styles
Modes you can select for displaying a solid or surface. You can set the display
            to be transparent, opaque, or metallic. See Graphics styles.
      Facet
Simple triangular face used to describe surface geometry in STL
            (stereolithography) file format.
      Fade scene
Make the geometry under the sketch grid more transparent, by selecting Fade Scene
            Under Grid in the Display tab. Selecting this option enhances the visibility of your
            sketch.
      Fill
Use the Fill tool to simplify or clean up geometry by extending surrounding faces
            to eliminate a selection. The selected region is filled in or healed with the
            surrounding surface or solid.
      Fillet
Rounded corner at the intersection of two lines or edges; concave intersection
            between two surfaces. Fillet refers to an interior corner; exterior corner is known as a
            round. You can draw a fillet using the Create Rounded Corner tool or by selecting the
            Fillet (Constant radius round) option from the Pull options. See Round.
      Filleted corner
See Fillet
      Filter
See Selection filter
      Flag note
See Note
      Fulcrum
Hinge; pivot point. When using the Move tool, you can select an object and use
            the Fulcrum tool guide to move other objects around it.
      Full pull
Pull tool option that enables you to revolve 360 degrees or to the next face,
            sweep through the full trajectory, or blend through selected faces.
      General view
One of the view selections for drawing sheets. General view makes the selected
            view independent of the view used to create it. See Projected view, Cross-section view,
            and Detail view.
      Geometric tolerances
Annotation symbols used for dimensioning geometry in technical drawings; usage is
            guided by ASME, ISO, and other standards.
      Golden rectangle
A rectangle with ratio of side lengths (approximately 1:1.618) considered by
            artists and architects to be aesthetically pleasing. As you sketch a rectangle, an
            indicator line appears when the shape has the proportions of a square or golden
            rectangle.
      Graphics styles
Modes you can select for displaying a design. You can display geometry as shaded,
            perspective shaded, wireframe, wireframe with hidden lines displayed in light gray, and
            wireframe with hidden lines removed. You can apply styles to your entire design or
            drawing sheet, to individual layers, or to individual views in your drawing sheet. See
            Face styles.
      Grid
See Sketch grid
      Grid lines
See Face grid
      Groups
Sets of objects that appear in the Groups tab. You create a group from any set of
            selected objects. Information such as Selection, Alt+selection, move anchoring, axis,
            and ruler dimension is all stored with the group.
      GTOL
See Geometric tolerance
      Guides
See Tool guides
      Heal
See Fill
      Helix
Pull tool option that revolves the selected shape around an axis to create a
            screw or drill shape. You control the height, direction, pitch, and taper.
      Home view
Tool used to return the view to the Home settings. You can customize the Home
            view tool so that it displays your design with a specific orientation, location, and
            zoom level.
      Imprinted edge
A line that does not define a corner. For example, you might create an imprinted
            edge on a face of a cube, if you want to divide the face and pull different parts.
            Imprinted edges are often created when importing designs.
      Inking a line
See Project to sketch
      Interference
Edges where solids intersect each other or volumes created by the intersection of
            solids, surfaces, and components in your design; can be displayed using the Analysis
            tools.
      Intersect
A tool used to split solids and faces.
      Inverse selection
The inverse of the current selection in the active component. For example, if you
            select the top face of a cylinder, right-click and select Select > Inverse Selection,
            the entire cylinder except the top face will be selected.
      ISO
International Organization for Standardization standards for architectural and
            engineering drawing, including guidelines for dimensioning and tolerancing. You can
            customize the style of your annotations to conform to ISO standards. See ASME,
            JIS.
      Isometric view
3D view of surfaces and edges, oriented to show the top, front, and side faces of
            your design. The angles between the projection of the x, y, and z axes are all equal at
            120�. See Trimetric view.
      JIS
Japanese Standards Association standards for technical drawings. You can
            customize the style of your annotations to conform to JIS standards. JIS defaults are
            the same as ISO, except that JIS uses third-angle views while ISO uses first-angle
            views. See ASME, ISO.
      Layer
Grouping mechanism for visual characteristics such as visibility and color. You
            can group objects on layers to organize your drawing. Layers are especially useful when
            you want to show or hide annotation planes.
      Layout
2D drawing mode that is most useful when you have no immediate need to generate
            3D objects from the lines in the layout. If you try to pull layout lines to 3D, they do
            not behave the same way that sketched lines do. Think of a layout as a pencil drawing
            made on your design. When you are ready to use your layout to create geometry, you must
            project the layout lines to a sketch. Projecting a layout line to a sketch is like
            inking the line. You can import a 2D AutoCAD DXF or DWG file as a layout.
      Library
You can select from the Materials Library in the Properties panel and add them to
            your Local Materials. In Scripting, the Class Library is a help document that describes
            the API.
      Lightweight assembly
Graphics-only representation of a design. When inserting an external file into a
            design, select the Enable lightweight assemblies option to load only the component's
            graphic information. This improves performance of large and complex assemblies for
            quicker viewing. When you are ready to work with the component, you can load the
            geometry information.
      Lightweight component
See Lightweight assembly
      Line
A straight line, arc, or spline drawn in Sketch mode or on a layout plane. Lines
            have length but no area. When you pull a sketch into 3D with the Pull tool, lines become
            edges.
      Local materials
See Library
      Markup
Slides you can create to highlight and communicate the differences between
            versions of a design.
      Mass
Analysis tool used to display mass properties, or volume information for the
            solids and surfaces in your design.
      Mass properties
See Mass
      Material
Property that you can assign to an object, consisting of material name and
            attributes such as density and tensile strength.
      Materials library
See Library
      Mating condition
Attribute of components that specifies how they are aligned with each other. You
            create mating conditions with the Assembly tools.
      Measure
Tools for displaying measurement properties of the edges, faces, and solids in
            your design.
      Mini-toolbar
Set of tool-specific options that appears when you right-click in the Design
            window. You can also access the options in the Options panel.
      Mirror
Associative relationship between two faces or planes mirrored about a centerline
            plane or planar face. The second object is a copy of the original; if the geometry of
            the original is changed, the mirrored copy is also updated. Use the Mirror tool to
            designate a face or plane as a mirror, or to create a mirror plane between two
            faces.
      Mode
Three ways of designing: Sketch, Cross-section, or 3D. You can switch between
            modes at any time.
      Mouse up
See Zoom box in
      Move
A tool used to translate or rotate geometry.
      Neutral plane - Pull tool
The plane, face or edge around which you want to pivot.
      Non-planar edges
Edges that do not lie in the same plane. See Planar edges.
      Normal
The vector that is perpendicular to a flat plane at the selected point. In the
            case of a non-flat plane, the vector that is perpendicular to the plane tangent to the
            surface at the selected point.
      Note
Annotation placed on a design or drawing sheet. Notes contain text or
            symbols that you insert and can be connected to geometry by a note leader.
      Object
Anything recognizable by the tools. 3D objects include vertices, edges, faces,
            surfaces, solids, layouts, planes, axes, and origins. 2D objects include points and
            lines.
      Offset
Distance an edge, segment, or curve is moved or copied.
      Offset baseline faces
See Offset relationship
      Offsetting faces
Pulling a face without selecting the edges. The pull extends the neighboring
            faces without creating an edge. The neighboring faces extend to bound the offset face,
            creating a new section defined by the adjacent geometry.
      Offsetting lines
Using the Offset Line tool to create an offset of any line or spline in the grid
            plane. A new object is created at a specified distance from the selected
            object.
      Options panel
Area of the user interface that enables you to modify functions specific to
            tools.
      Ordinate dimensions
X or Y distances that originate from a single location, which is usually the
            lower left corner of the object. Also known as datum dimensioning or baseline
            dimensioning
      Orientation angle
Property that you define when sketching a polygon. Orientation angle determines
            the polygon's rotational position.
      Origin
Zero point in coordinate system. You can insert an origin at any location in your
            design where you can anchor the Move tool, enabling you to dimension from the origin or
            quickly move the sketch grid to the origin. You can also insert an origin at a solid's
            center of mass or volume.
      Origin Axis
Axis through the origin.
      Orthogonal view
Projection that is constrained to regular 90° angles (top, bottom, left, and
            right of the current view). When you create a projected view from one of the other views
            on the drawing sheet, the available projections are orthogonal
            (orthographic).
      Pan
Move a drawing around by dragging the drawing area around your screen; move the
            viewpoint laterally relative to the drawing.
      Pan with multi-touch
Move two fingers together across the screen.
      Panel
Sections of the user interface that initially appear along the left side of the
            application window and include: Structure panel, Layers panel, Selection panel, Groups
            panel, Options panel, and Properties panel. You can dock and detach these
            panels.
      Parent component
A component upon which other components depend. For example, in a block with a
            hole, the block is the parent and the hole is the child.
      Patch blend
Fill tool option that uses the initial tangency of the neighboring faces to fill
            the selected edges. Faces are blended into a smooth, single-face patch, instead of
            extending the faces attached to the edge until they intersect. Deselecting the Tangent
            extension option ignores the tangency of the neighboring faces.
      Periodic blend
Pull tool option used to go all the way around when blending faces.
      Periodic face
A cylinder, cone, or other revolved surface.
      Pitch
Unit of length that a helix face shifts per 360° rotation; distance from one
            point on a thread to the corresponding point on the next thread.
      Pivot line
Line around which a face is revolved using the Pull tool.
      Plan view
Head-on view.
      Planar edges
Two or more edges that lie in the same plane. You can select planar edges and
            select the Plane tool from the Insert ribbon group to insert the plane defined by the
            edges.
      Planar face
Face that lies within a plane.
      Plane
Construction geometry consisting of a flat surface. Planes can be used for a 2D
            sketch, section view of a model, a neutral plane in a draft feature.
      PMI
Product Manufacturing Information. 
      Point
Single location in the sketch grid. 2-D object that has no height, width, or
            length. The origin, an axis, and a vertex are examples of points. Use the Point tool to
            sketch a point on the sketch grid. Points are useful as a dimensional reference, for
            splitting, and for creating a point on a line or curve through which you want to draw a
            three-point circle.
      Polar coordinates
See coordinates
      Polygon
Complex object composed of three or more straight lines in a closed figure. Use
            the Polygon tool to sketch a polygon with up to 32 sides.
      Power selection
Advanced selection tool available from the Selection tab. Enables you to search
            for and select all objects with geometry similar to the currently selected
            object.
      Profile
Line in space; outline of an object; used to describe objects when sweeping or
            blending.
      Project to sketch
Tool used to convert 2D layout lines to a sketch so you can use the layout to
            create geometry.
      Projected view
One of the view selections for drawing sheets. You create a projected view from
            one of the other views on the drawing sheet to show another side of the model. See
            General view, Cross-section view, and Detail view
      Properties panel
Area of the user interface that displays editable details about the selected
            object(s). This panel is initially displayed on the lower left side of the screen, but
            can be moved.
      Pull
Tool used to distort or deform geometry. Use the Pull tool to offset, extrude,
            revolve, sweep, draft, and blend faces; or to round, chamfer, or extrude edges. When
            converting a sketch to 3D, pulling a line creates a surface and pulling a surface
            creates a solid.
      Quality
Tools for detecting anomalies or discontinuities in surfaces.
      Quick Access Toolbar
Tool icons that appear at the top of the user interface, next to the File menu,
            and include common Windows commands such as Open, Save, and Undo. You can customize the
            toolbar so that it contains the file-related shortcuts you use most often.
      Radial slot
A slot created by pulling a hole toward the axis of the driving cylinder. See
            Curved slot.
      Radiused corner
See Fillet (interior corner) or Round (exterior corner)
      Reference line
Line used as the starting point for dimensioning.
      Region
When you sketch shapes in 2D using the sketch tools, regions are formed by closed
            or intersecting lines. The regions will become solids and the lines become edges when
            you pull your sketch into 3D with the Pull tool.
      Regular face
An unblended face. The face must be converted to a blended face before you can
            edit the face as a blend. See Blend surface
      Relative coordinates
See Coordinates
      Remove associations
Tool that removes an associative relationship. For example, removing a polygon
            relationship enables you to make changes to only one face of the polygon solid without
            affecting the other faces. See Associations.
      Rendering
Mode available from the Properties panel for a view on a drawing sheet. Use
            Rendering mode to change the Graphics style for the view. Select Inherit if you want to
            link the graphics style to the parent view. See Graphics styles.
      Revolve
Move in a path around an axis. Use the Pull tool to revolve faces, edges, or a
            helix around an axis. The axis may be a straight line, axis, or edge. See Subtractive
            revolve.
      Revolve axis
A straight line, axis, or edge around which you revolve a face, edge, or
            helix.
      Rotate
Design: Using the Rotate tool to spin a design 90 degrees in the plane of the
            screen. You can rotate your design clockwise or counterclockwise. Object: Using the Move
            handle to spin an object around an axis.
      Rotate with multi-touch
Hold one finger on the axis you want to rotate around and move the other finger
            in an arc that is centered on your first finger.
      Rotational blend
Pull tool option used when blending faces to create cylinders and cones whenever
            possible.
      Round
Rounded corner at the intersection of two lines or edges. Round refers to an
            exterior corner; an interior corner is known as a fillet. Rounds and fillets are both
            called rounds. See Fillet, Constant-radius round, Variable-radius round.
      Round Group
Grouping that is created each time you fill a round. You can reattach a group of
            rounds as long as some portion of the original edges (or faces that bordered the edges)
            still exists in your design. See Group.
      Ruler dimension
Option used to enter precise dimensions when pulling or moving. Dimensions may be
            linear when moving or pulling, or angular when rotating.
      Scale
Solid or surface: Change the size of the selected object using the Pull tool. You
            can scale dynamically or by entering a scale value. Drawing sheet or cross-section
            views: Magnify or shrink the view by selecting a View in the Structure tree and editing
            the Properties panel.
      RSDOC file
File format for SpaceClaim files (.rsdoc). Files comply with the Microsoft Open
            Packaging Convention, which is also used by Microsoft Office 2007. These files are
            actually zip archives with a special structure, the contents of which are primarily XML
            data.
      Section
Design mode in which you edit solids by working with their edges and vertices in
            cross-section. View is cut away to show interior detail.
      Section mode
See Section
      Selection filter
Drop-down control in the status bar that can be used to limit the selection of
            objects. Only object types you check will be selected; for example, only faces and
            edges.
      Selection tab
Area of the user interface where you can locate objects similar to the ones
            selected. See Power selection.
      Shell
Solid or part that is hollowed out from a selected face, leaving a shell of
            designated thickness.
      Shell relationship
Association that stays with a solid when it is moved to another component, unless
            the relationship would link two components when it is moved. See Shell.
      Silhouette edge
Edge that is rotated to conceal a 3D object and appears as a 2D line.
      Sketch grid
Pattern of regularly spaced lines that guides you when sketching. The sketch grid
            makes aligning and drawing objects easier.You can adjust the units and spacing of the
            grid, as well as how solids are displayed when the grid appears.
      Sketch mode
Mode for drawing in two dimensions using the sketching tools on the sketch grid.
            A sketch is a collection of lines and other 2D objects on a sketch grid. Sketching
            creates regions that can be pulled into 3D. When you pull your sketch into 3D with the
            Pull tool, regions formed by intersecting lines will become solids and lines will become
            edges.
      SLA
See Stereo lithography
      Snap
Constrain to objects, angular and linear increments, or grid points while you are
            sketching or editing solids. You can customize the snapping behavior in File>Options.
            Pressing Shift while dragging snaps the tool based on your snap settings. You can use
            the Snap to grid tool to constrain or lock all drawing to grid points only.
      Snap view
Tool used to display the head-on view of a face. You can also use the tool to
            "throw" the highlighted face to the top, bottom, right, or left.
      Solid
Object that encloses volume. A surface becomes a solid if it encloses
            volume.
      Spin
Tool used to re-orient your design in any direction, allowing you to view it from
            any angle.
      Spin center
Axis about which you spin your design when you use the Spin tool.
      Spline
A continuously curved line, without sharp boundaries (that is, without vertices).
            Create a spline by defining a set of points using the Spline tool. A spline becomes an
            edge when you pull it with the Pull tool.
      Split
Using the Combine tool to split solids or surfaces. You select a solid or surface
            to use as a Cutting tool to cut the target. See Cutter object.
      STEP
Standard for the Exchange of Product model data (ISO 10303). Defines a
            methodology for describing product data. You can select the STEP protocol when you
            export designs.
      Stereo lithography
Technology used for rapid prototyping, in which a laser hardens successive layers
            of a photopolymer to create a part with a shape defined by a computer model.
      Sticky tool guide
Tool guides that are sticky appear with a double outline when clicked. After you
            click it, the tool guide remains selected so you can select multiple objects by clicking
            on each object.
      STL file
File format native to the stereo lithography CAD software created by 3D Systems.
            You can export parts and assemblies (.stl).See Stereo lithography.
      Structure tree
Display in the Structure panel that shows you each of the objects in your design.
            You can expand or collapse the nodes of the tree to view the objects. You can rename
            objects, create, modify, replace, and delete objects, as well as work with
            components.
      Subtractive
Manipulation (revolve, draft, pull, etc.) of a solid in which material is
            removed. In editing tools performing subtractive operations, the cursor changes to - to
            indicate that the edit is subtractive.
      Surface
Two dimensional object that has no thickness (as opposed to a face, which is part
            of a three-dimensional object). A surface has area but no volume. See Face.
      Surface finish symbols
Annotation you can add to a drawing that provides instructions for material
            removal during manufacturing.
      Sweep
Pull a surface or face along a line or edge using the Pull tool. You can sweep
            faces and edges, and select straight or curved lines or edges along which to sweep.
            Sweeping along a spline is a pulling technique for creating a smooth, swoopy shape. See
            Trajectory.
      Sweep arc
Arc created by defining a center point and two end points; drawn using the Sweep
            Arc tool.
      Sweep circle
The circular path followed by a Swept arc. See Swept arc.
      Sweep trajectory
See Trajectory
      Swept arc
See Sweep arc
      Tangent
Line that touches a curve (arc or circle) at only one point, without crossing
            over, and is perpendicular to the radius at the point of tangency. You can sketch a line
            tangent to a curve or you can sketch an arc tangent to a line or curve.
      Tangent arc
Arc that is sketched using the Tangent Arc tool, using a point on a line or curve
            as the starting point.
      Tangent chain
See Edge chain.
      Tangent edges
Transition edge between rounded or filleted faces in hidden lines visible or
            hidden lines removed modes in drawings.
      Tangent extension
See Patch blend
      Tangent faces
Faces created by rounds or when edges are drawn on a face.
      Taper
Angle of a helix or threads made on a conical surface. See Helix,
            Thread.
      Target
The object you want to cut, when using the Combine tool to split a solid or
            surface.
      Tessellation
An approach for data exchange between CAD programs. Tessellation represents
            entities such as lines and surfaces in a CAD system with tiny triangles (polygonal data
            representations). Data formats such as XML are examples of tessellated
            data.
      Theme
Set of view navigation options used for spin, pan, and zoom.
      Thread
Texture created on the surface of a cylinder, cone, or hole using the Annotation
            tools.
      Three point arc
Arc created by defining a starting point, an end point, and a radius; drawn using
            the Three-Point Arc tool.
      Tool guides
Functions that are specific to the selected tool.
      Torus
Doughnut-shaped object created using the Pull tool to sweep a sketched shape
            around an axis on a circular path.
      Trajectory
Straight or curved line or edge along which you sweep a face or an
            edge.
      Translate
Move in a plane (x, y, or z).
      Trim away
Delete a line portion bounded by an intersection with a line or edge.
      Trimetric view
3D view of surfaces and edges, oriented to show the top, front, and side faces of
            your design. Compared to isometric view, trimetric view angles the front face slightly
            towards you, shows less of the side face, and less of the top. This is the default Home
            view. See Isometric view.
      U-V lines
See Face Grid
      UV grid
See Face Grid
      Variable radius round
Fillet created from a constant-radius round by selecting one edge of the round
            and pulling it to a new radius. See Fillet, Constant-radius round.
      Vertex
Point that terminates a line; point at which two or more lines or edges
            intersect. Vertices can be selected for sketching, dimensioning, and other
            operations.
      View
Orientation settings that you can apply to your design, including spin, pan, and
            zoom. You can adjust these settings individually or you can apply one of the following
            preconfigured views: Trimetric, Isometric, Top, Bottom, Front, Back, Right, Left. You
            can also select Snap View and click a face to view it head-on.
      Virtual sharp
Point of intersection formed by extending converging lines.
      Wireframe
View mode in which all edges of the part or assembly are displayed.
      World origin
Axes that set the default orientation of the design in the Design window. Display
            the World origin by checking the World Origin box on the Display tab.
      Zoom box in
Tool used to pan and zoom until the design fits within a selected
            area.
      Zoom extents
Tool used to enlarge or contract the view so that the selected face, the selected
            edge, or the design fills the Design window. If you are working with a drawing sheet,
            Zoom extents will fit the drawing sheet to the Design window.