Sentence Examples

  • ALIDADE (from the Arab.), the movable index of a graduated arc, used in the measurement of angles.
  • 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.
  • Crossed out, the circle being crossed by diameters to show the degrees; others have found in it a corruption of "the alidade" (q.v.).

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