theodolite

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theodolite

theodolite , calibrated optical instrument used to determine relative position in surveying , navigation, and meteorology. It is similar in construction to a surveyor's transit, consisting of a telescope fitted with a spirit level and mounted on a tripod so that it is free to rotate about its vertical and horizontal axes. (Sometimes two or more telescopes of different magnifications are used.) Graduated scales are used to measure the amount of rotation about the axes. Measurements of the altitude and azimuth of a weather balloon at precise time intervals are used to compute the estimated wind velocity of the atmosphere.

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"theodolite." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 17 Dec. 2009 <http://www.encyclopedia.com>.

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theodolite

The Concise Oxford Dictionary of English Etymology | 1996 | | Â© The Concise Oxford Dictionary of English Etymology 1996, originally published by Oxford University Press 1996. (Hide copyright information) Copyright

theodolite portable surveying instrument for measuring (orig. horizontal) angles. XVII. Earlier (XVI) in modL. form theodelitus; of unkn. orig.

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T. F. HOAD. "theodolite." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 17 Dec. 2009 <http://www.encyclopedia.com>.

T. F. HOAD. "theodolite." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (December 17, 2009). http://www.encyclopedia.com/doc/1O27-theodolite.html

T. F. HOAD. "theodolite." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved December 17, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-theodolite.html

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theodolite

The Oxford Pocket Dictionary of Current English | 2009 | © The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information) Copyright

the·od·o·lite / [unvoicedth]ēˈädəˌlīt/ • n. a surveying instrument with a rotating telescope for measuring horizontal and vertical angles. DERIVATIVES: the·od·o·lit·ic / -ˌädəˈlitik/ adj.

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