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Surveying instrument
Answer for the clue "Surveying instrument ", 7 letters:
alidade
Alternative clues for the word alidade
- Surveyor's instrument
- Angular measurement device used in surveying
- Part of a surveying instrument
- Surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles
- Surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments
Word definitions for alidade in dictionaries
WordNet
Word definitions in WordNet
n. surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments [syn: alidad ] surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles ...
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Alidade \Al"i*dade\, n. [LL. alidada, alhidada, fr. Ar. al-'id[=a]da a sort of rule: cf. F. alidade.] 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 ...
Wiktionary
Word definitions in Wiktionary
n. (context cartography astronomy surveying English) A sighting device used for measuring angles.
Wikipedia
Word definitions in Wikipedia
An alidade (archaic forms include alhidade , alhidad , alidad ) or a turning board is a device that allows one to sight a distant object and use the line of sight to perform a task. This task can be, for example, to draw a line on a plane table in the direction ...
Usage examples of alidade.
Hugh sat outside with the astrolabe in his hands, turning it over, spinning the alidade, tracing the lines on the plates with his fingers, and obviously having no idea how to use it even to tell time.
Hugh sat outside with the astrolabe in his hands, turning it over, spinning the alidade,tracing the lines on the plates with his fingers, and obviously having no idea how to use it even to tell time.
The alidade, or diametral rule, which served as a sun sight, could pick up the sun's shadow, and throw it across the coinciding circles of time and latitude.
The surveyors of the time did not have alidades, mountain transits, nor pocket transits like the Brunton compass.
With the help of the alidades, a watch with known slip, and an ephemeris, the students would be able to locate themselves.