Dictionary:
al·i·dade (ăl'ĭ-dād')  also al·i·dad
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[French, from Medieval Latin alidada, sighting rod, from Arabic al-‘iḍāda, the revolving radius of a circle : al-, the + ‘iḍāda, revolving radius (alternate form of ‘aḍud, humerus, from ‘aḍada, to lop, cut (trees)).]
| 5min Related Video: alidade |
| Architecture: alidade |
The part of a surveying instrument which consists of a sighting device, with index, and reading or recording accessories.
| Archaeology Dictionary: alidade |
At its most simple, a flat wooden or metal strip with a scaled straight edge on one side and sighting mounts at each end so that it can be aligned on specific target points when used in conjunction with a plane table. More sophisticated alidades are equipped with telescopic sights and a series of levels and scales to measure vertical angles. See plane table.
| WordNet: alidade |
The noun has 2 meanings:
Meaning #1:
surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments
Synonym: alidad
Meaning #2:
surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles
Synonym: alidad
 | plane table |
| demicircle |
| telescopic alidade (engineering) |
 | What is the difference between an alidade and a transit level? |
Copyrights:
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 | Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved. Read more |
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| Architecture. McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc. All rights reserved. Read more |
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| Archaeology Dictionary. The Concise Oxford Dictionary of Archaeology. Copyright © 2002, 2003 by Oxford University Press. All rights reserved. Read more |
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| WordNet. WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. Read more |
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