[n] - surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments 2. [n] - surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles
Found on http://www.webdictionary.co.uk/definition.php?query=alidade
That part of an optical measuring instrument comprising the optical system, indicator, vernier, etc.In modern practice the term is used principally to refer to a telescope mounted over a compass or compass repeater to facilitate observation of bearings, and to a surveying instrument consisting of a ...
Found on http://www.diracdelta.co.uk/science/source/a/l/alidade/source.html
Al'i·dade noun [ Late Latin alidada , alhidada , from Arabic al-'idāda a sort of rule: confer French alidade .] The portion of a graduated instrument, as a quadrant or astrolabe, carrying the sights or telescope, and s...
Found on http://www.encyclo.co.uk/webster/A/54
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 ... Origin: LL. Alidada, alhidada, fr. Ar. Al-'idada a sort of rule: cf. F. Alidade. ... Source: Websters Dictionary ... (01 Mar 1998) ......
Found on http://www.mondofacto.com/facts/dictionary?alidade
alidad noun surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles
Found on http://wordnetweb.princeton.edu/perl/webwn?s=alidade
• (n.) 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
Found on http://thinkexist.com/dictionary/meaning/alidade/
(from the article `armillary sphere`) The Arabs employed similar instruments with diametric sight rules, or alidades, and it is likely that those made and used in the 12th century by ... ...with a `map` of the stars, including the aforementioned circles, that rotated on the mater around a centre pin...
Found on http://www.britannica.com/eb/a-z/a/46
An alidade (archaic forms include alhidade, alhidad, alidad) or a turning board is a device that allows one to sight a distant object and use the line of sight to perform a task. This task can be, for example, to draw a line on a plane table in the direction of the object or to measure the angle to...
Found on http://en.wikipedia.org/wiki/Alidade
1) Alidad 2) Surveying instrument 3) Surveyor`s instrument
Found on http://www.mijnwoordenboek.nl/EN/crossword-dictionary/alidade/1
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