Quadrant of altitude

Related to Quadrant of altitude: Lateen rig
an appendage of the artificial globe, consisting of a slip of brass of the length of a quadrant of one of the great circles of the globe, and graduated. It may be fitted to the meridian, and being movable round to all points of the horizon, serves as a scale in measuring altitudes, azimuths, etc.

See also: Quadrant

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.