## GTT D&M Lesson 1.5

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##### Created by:

mrswidener  on June 23, 2010

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# GTT D&M Lesson 1.5

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#### Definitions

Annotate To add explanatory notes to.
Browser A sequential record of the construction steps in a 3D modeling program.
CAD (Computer-Aided Design) The use of a computer to assist in the process of designing a part, circuit, building, etc.
Chamfer A small angled surface formed between two surfaces.
Coincident Occupying the same area in space.
Collinear Lying in the same straight line.
Concentric Circles or arcs that share the same center.
Constraint A limit to a design process. Constraints may be such things as appearance, funding, space, materials, and human capabilities. A limitation or restriction.
Counterbore A cylindrical recess around a hole, usually to receive a bolt head or nut.
Countersink A conical-shaped recess around a hole that is often used to receive a tapered screw.
Design An iterative decision-making process that produces plans by which resources are converted into products or systems that meet human needs and wants or solve problems.
Dimension Constraint Used to describe the size and location of individual geometric shapes.
Documentation The documents that are required for something or that give evidence or proof of something. A drawing or printed information that contains instructions for assembling, installing, operating, and servicing.
Edit A change or correction made as a result of editing.
Extend Make larger in area.
Feature A distinctive attribute or aspect.
Fillet A rounded interior blend between two surfaces.
Fabricate Construct or manufacture an industrial product.
Fix Attach or position securely.
Functional Designed to be practical and useful.
Geometric Constraints Restrictions applied to geometric entities; for example, horizontal, parallel, perpendicular, and tangent.
Horizontal Parallel to the X axis.
Isometric A form of pictorial drawing in which all three drawing axes form equal angles of 120 degrees with the plane of projection.
Mockup A model devised to expose its parts for study, training or testing.
Model A visual, mathematical, or three-dimensional representation in detail of an object or design, often smaller than the original. A model is often used to test ideas, make changes to a design, and to learn more about what would happen to a similar, real object.
Offset The amount by which something is out of line.
Parallel Lines, planes, or surfaces side by side and having the same distance continuously between them.
Perpendicular At an angle of 90˚ to a given line, plane, or surface.
Polygon A closed geometric figure in a plane formed by connecting line segments endpoint to endpoint with each segment intersecting exactly two others. Polygons are classified by the number of sides they have, such as a triangle has three sides, a quadrilateral has four sides, and a pentagon has five sides.
Profile An outline of something as seen from one side.
Prototype A full-scale working model used to test a design concept by making actual observations and necessary adjustments.
Revolve To move in a circle about a central axis.
Right Triangle A triangle that has a 90 degree angle.
Rotation Turning around an axis or center point.
Sketch Plane The surface that 2D profiles can be sketched on.
Specification A detailed description of the design and materials
Tangent A straight line or plane that touches a curve or curved surface at one point.
Trim Cut off irregular or unwanted parts.
Vertical Parallel to the Y axis.

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