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more about alidade
alidade |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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 the instrument --Whewell.
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