alidade
[ al-i-deyd ]
/ ˈæl ɪˌdeɪd /
|
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.
Nearby words
alice's fern, alice-in-wonderland, alicia, alick, alicyclic, alidade, alien, alien and sedition acts, alienable, alienage, alienate
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)
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for alidade
Your scale is ready to be pasted or transferred to the alidade and each 6.8.
Military Instructors Manual|James P. Cole and Oliver SchoonmakerThe alidade is a triangular ruler with one or more working scales on it beside other measurements.
Military Instructors Manual|James P. Cole and Oliver SchoonmakerClose by stood an alidade, an instrument for measuring angles.
Historical Miniatures|August StrindbergAfter he had placed the plane table on a tripod and upon this the alidade, he started to work.
On the Seaboard|August Strindberg
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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