trimetrogon

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

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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. 2019 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

Word Origin for trimetrogon 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