Definitions for "Alidade"
The portion of a graduated instrument, as a quadrant or astrolabe, carrying the sights or telescope, and showing the degrees cut off on the arc of the instrument
The horizontal plate in a transit which carries the verniers, the level bulbs, and the standards, and which revolves about the graduated limb: an attachment on many instruments for measuring angles. A straight edge, having a telescope mounted thereon, used in plane table surveying.
An optical surveying instrument used along side a plane-table and stadia-rod to produce a detailed small-scale topographical map.
Keywords:  definition
Definition of alidade.