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tachymeter

[ta-kim-i-ter, tuh-] /tæˈkɪm ɪ tər, tə-/
noun, Surveying
1.
any of several instruments for rapidly determining distances, directions, and differences of elevation.
Origin
1855-1860
1855-60; tachy- + -meter
Related forms
tachymetry, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for tachymeter

tacheometer

/ˌtækɪˈɒmɪtə/
noun
1.
(surveying) a type of theodolite designed for the rapid measurement of distances, elevations, and directions

tachymeter

/tæˈkɪmɪtə/
noun
1.
another name for tacheometer
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for tachymeter
n.

1836, from tachy- "swift" + -meter.

M. GAETANO CAÏRO has invented an instrument, to which he has given the name of Tachymeter (rapid measurer). Its object is to give the area of plane surfaces bounded by any outline whatever, without the necessity of any arithmetical operation. ["Magazine of Popular Science and Journal of the Useful Arts," Volume 2, 1836]

Online Etymology Dictionary, © 2010 Douglas Harper
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