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trimetrogon

[trahy-me-truh-gon]
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adjective
  1. of or relating to a system of aerial photography using three cameras, one pointed directly downward and the others at 60° to it.
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Origin of trimetrogon

1940–45; tri- + Greek métro(n) measure + -gon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for trimetrogon

trimetrogon

noun
    1. a method of aerial photography for rapid topographic mapping, in which one vertical and two oblique photographs are taken simultaneously
    2. (as modifier)trimetrogon photography
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Word Origin

from tri- + metro-, from Greek metron measure + -gon
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