alidad's Usage Examples:

Gil Maestre, in his El Anarquismo en Espana, y el especial de Barcelona (Madrid, 1897), and in his La Criminalidad en Barcelona (Barcelona, 1886).

A circular plate ' made much like the backe parte of an Astrolabe ' with a pivoted alidade, the sights.

THEODOLITE,' a surveying instrument consisting of two graduated circles placed at right angles to each other, for the measurement of horizontal and vertical angles, a telescope, which turns on axes mounted centrically to the circles, and an alidade for each circle, which carries two or more verniers.

Alidade >>crossed out, the circle being crossed by diameters to show the degrees; others have found in it a corruption of "the alidade" (q.