alidad
1. [ noun ] surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments
Synonyms: alidade
Related terms: surveying_instrument theodolite
2. [ noun ] surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles
Synonyms: alidade
Related terms: surveying_instrument
Similar spelling:   alidade
  altitude
  aldehyde
  aldehydic