alidade
[ al-i-deyd ]
/ ˈæl ɪˌdeɪd /
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noun Surveying.
(in plane-tabling) a straightedge having a telescopic sight or other means of sighting parallel to the straightedge.
the entire upper part of a theodolite or transit, including the telescope, its supports, the level vials, the circle-reading device, and the spindle.
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Also al·i·dad [al-i-dad]. /ˈæl ɪˌdæd/.
Origin of alidade
1400–50; variant of alhidade<Medieval Latin alhidada<Arabic al-ʿiḍādah the turning radius (like a clock hand) of a circle; replacing late Middle English allydatha (<Old Spanish alhidada)
Words nearby alidade
Alice Springs, Alicia, Alick, lick and a promise, a, alicyclic, alidade, alien, alienable, alienage, Alien and Sedition Acts, alienate
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for alidade
British Dictionary definitions for alidade
alidade
alidad (ˈælɪˌdæd)
/ (ˈælɪˌdeɪd) /
noun
a surveying instrument used in plane-tabling for drawing lines of sight on a distant object and taking angular measurements
the upper rotatable part of a theodolite, including the telescope and its attachments
Word Origin for alidade
C15: from French, from Medieval Latin allidada, from Arabic al-'idāda the revolving radius of a circle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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