Thesaurus: alidade

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Definitions

1. n. 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
2. n. surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments
3. n. surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles
4. 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 Whewell.
5. The portion of a graduated instrument, as a quadrant orastrolabe, carrying the sights or telescope, and showing the degreescut off on the arc of the instrument Whewell.
6. n. surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments n. surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles