surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments
source: WordNet 3.0
surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles
source: WordNet 3.0
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
