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Meaning of alidade

al•i•dade

Pronunciation: (al'i-dād"), [key]
— n. Survey.
  1. (in plane-tabling) a straightedge having a telescopic sight or other means of sighting parallel to the straightedge.
  2. the entire upper part of a theodolite or transit, including the telescope, its supports, the level vials, the circle-reading device, and the spindle.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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