2011

AutoCAD library search path The order in which looks for a support file: current directory,
drawing directory, directory specified in the support path, and directory containing the
executable file, acad.exe.
AutoCAD window The drawing area, its surrounding menus, and the command line.
axis tripod Icon with X, Y, and Z coordinates that is used to visualize the viewpoint (view
direction) of a drawing without displaying the drawing. (VPOINT)
B-spline curve A blended piecewise polynomial curve passing near a given set of control
points. See also Bezier curve. (SPLINE)
back face The opposite side of a front face. Back faces are not visible in a rendered image.
See also front faces.
base point 1. In the context of editing grips, the grip that changes to a solid color when
selected to specify the focus of the subsequent editing operation. 2. A point for relative
distance and angle when copying, moving, and rotating objects. 3. The insertion base point
of the current drawing. (BASE) 4. The insertion base point for a block definition. (BLOCK)
baseline An imaginary line on which text characters appear to rest. Individual characters
can have descenders that drop below the baseline. See also baseline dimension.
baseline dimension Multiple dimensions measured from the same baseline. Also called
parallel dimensions. See also baseline.
basic tooltip Displays a brief description for the tooltip.
basic wheels A reference to the View Object wheel and Tour Building wheel.
Bezier curve A polynomial curve defined by a set of control points, representing an equation
of an order one less than the number of points being considered. A Bezier curve is a special
case of a B-spline curve. See also B-spline curve.
big wheels The large version of the SteeringWheels. Labels are displayed on each wheel
wedge and they are larger than the size of the cursor.
bitmap The digital representation of an image having bits referenced to pixels. In color
graphics, a different value represents each red, green, and blue component of a pixel.
blips Temporary screen markers displayed in the drawing area when you specify a point or
select objects. (BLIPMODE)
block A generic term for one or more objects that are combined to create a single object.
Commonly used for either block definition or block reference. See also block definition and
block reference. (BLOCK)
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