2011

Table Of Contents
Longitude begins at 0 degrees at the Prime Meridian in Greenwich, England
and is measured from -180 to 180.
Latitude is 0 degrees at the equator and is measured from -90 to 90.
lofted solid/surface A solid or surface that is drawn through a set of two or
more cross-section curves. The cross sections define the profile (shape) of the
resulting solid or surface. Cross sections (generally, curves or lines) can be
open or closed. (LOFT)
lookup property In a dynamic block definition, a lookup parameter that you
add to a lookup table. The lookup parameter label is used as the property
name. When the parameter values in a dynamic block reference match a row
of input property values, the corresponding lookup property values in that
table row are assigned to the block reference. (BLOOKUPTABLE)
lookup table Defines properties for and assigns property values to a dynamic
block. Assigns property values to the dynamic block reference based on how
the block is manipulated in a drawing. (BLOOKUPTABLE)
lumen The SI unit of luminous flux (Symbol: lm). Cd * Sr
luminaire This refers to the aggregation of a lamp or lamps and its fixture.
The fixture may be a simple can or a complex armature with constrained
joints.
luminance Luminance is the value of light reflected off a surface. It is a
measure of how bright or dark we perceive the surface.
luminous flux The perceived power in per unit of solid angle. The total
luminous flux for a lamp is the perceived power emitted in all directions.
lux The SI unit of illuminance (symbol: lx). Lm/m^2
macro-derived selection A selection set of all the objects that have been
created during the playback of an action macro up to the command that is
requesting a selection set.
magnitude See bulge magnitude.
main customization file A writable CUI file that defines most of the user
interface elements (including the standard menus, toolbars, keyboard
accelerators, and so on). The acad.cui file (the default main CUI file) is
automatically loaded when you start AutoCAD.
markup A single comment or a redline geometry correction inserted into a
DWF file using Autodesk Design Review.
markup set A group of markups contained within a single DWF file.
2170 | Glossary