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Definition of Alidade
1. Noun. Surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments.
Exact synonyms: Alidad
Generic synonyms: Surveying Instrument, Surveyor's Instrument
Group relationships: Theodolite, Transit
Generic synonyms: Surveying Instrument, Surveyor's Instrument
Group relationships: Theodolite, Transit
2. Noun. Surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles.
Definition of Alidade
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
Definition of Alidade
1. a device used in angular measurement [n -S]
Medical Definition of Alidade
1. 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 Origin: LL. Alidada, alhidada, fr. Ar. Al-'idada a sort of rule: cf. F. Alidade. Source: Websters Dictionary (01 Mar 1998)