Glossary

3D face: A triangular or four-sided flat surface that is the basic unit of a 3D surface.
3D mesh: A set of adjacent flat surfaces that together form a geometrical depiction of a three-dimensional curved surface.
3D model: An AutoCAD drawing file containing AutoCAD objects that occupy 3D space and represent building components or geometrical objects in the real world.

See also object.

absolute coordinates: Values for locating a point in space that describe its displacement from the origin (0,0,0) point of the drawing.
alias: A shortcut for starting commands. It's a set of one or two letters that you can enter at the command line instead of the full command.
aligned dimension: A linear dimension measuring the distance between two points. The dimension line for an aligned dimension is parallel to a line between the two points.
angular dimension: A dimension that measures the angle between two lines or the angle inscribed by an arc segment.
Angular unit: The unit in which angle values are displayed. The choices are Decimal Degrees, Degrees-Minutes-Seconds, Grads, Radians, and Surveyor units.
associative dimension: A dimension that updates automatically when the object being dimensioned changes size.
associative hatch pattern: A hatch pattern that updates automatically when the shape of the hatched area is modified.

See also hatch pattern.
AutoCAD object: See object.
AutoSnap: A feature of AutoCAD that works with the Object Snap tools by displaying a symbol on the places in the drawing that can be snapped to.

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AutoCAD 2007 and AutoCAD LT 2007: No Experience Required