AutoCAD Mechanical English Glossary
Annotations: Styled text or dimension values visible on a drawing.
Arc: A curved element defined by a center point, a radius, and two angles.
Base View: A named 2-D depicting an individual object or plane.
Block: An object or set of objects defined by drawing one or more objects and naming them, or downloading a drawing or image and naming it.
Break Line: A line representing an edge or junction in a 3-D model or drawing.
Circle: A closed curve defined by its center point, a radius, and by the angle of orientation.
Circular Edge: A circular boundary for a face, sketched between two vertices.
Clipping Deselect: Removal of a clipping selection from the current drawing.
Concentric Circle: A circle, the center of which coincides with the center of another circle.
Detail View: A named 2-D depicting part of a 3-D object.
Diameter: The linear distance from one side of a circle to the other, passing through the center point.
Dimension Line: A line terminating in arrows, used to indicate the length, width, or other measurement of a geometric object.
Drawing File: A file containing all the Create and edit information of a drawing object.
Edge: A straight line connecting two points.
Extrude: Creating a 3-D object by extruding a 2-D object in one or two directions.
Face: A flat plane of a 3-D object.
Fillet: A curved edge formed between two linear edges.
Grip Mode: A way of selecting and manipulating elements within the drawing without using a command.
Hidden Line View: A style of showing 3-D parts in outline form.
Isometric View: A type of orthographic projection showing a 3-D object from three viewpoints at 120º locations on the XYZ axes.
Leader: A pointer to text or drawings which is used to annotate a drawing.
Layer: A named group of geometry elements.
Lines: Straight or curved objects formed by connecting two points.
Limit Box: The maximum and minimum extents of a 3D object when displayed.
Mated Part: A 3D part that has been changed from its initial state, with two or more mating joints.
Multi View: A style of drawing which represents a 3-D part without depth.
Object Properties: A set of characteristics of a drawing that control the behaviour of an object.
Orthogonal View: A viewing direction in which one of the X, Y, or Z plane is parallel to the viewing plane.
Outer Edge: An invisible boundary representing the maximum and minimum extents of a 3-D object.
Projection View: A type of orthographic projection in which the front, top, and side views of a 3-D object are shown.
Quadrilateral: A four-sided polygon.
Radius: The linear distance from the center of a circle to its edge.
Rectangle: A four-sided polygon with opposite sides equal and parallel.
Scale Factor: A number that represents the ratio between the actual size of something and the size that it is drawn.
Shape: A 3-D object created by combining basic geometrical shapes and extruding them.
Sub-Object: Any portion of an object.
Texture: A pattern overlaid on an object or surface.
Tolerance: The permissible variation between an actual size and an accepted standard.
Top View: A named 2-D depicting a 3D objects from above.
Trace: An invisible boundary used to depict the shape of a part.
Trajectory: A vector that determines the movement of a 3-D object.
Vertex: A point where two or more geometric elements meet.
Wireframe: A 3-D depicting an objects edges only.
