of or relating to a binocular microscope equipped with a third lens system for photographic recording.
Origin of trinocular
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of or relating to a binocular microscope having a lens for photographic recording while direct visual observation is taking place
Word Origin for trinocular
C20: from tri- + (bi) nocular
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