[ trahy-kroh-iz-uh m ]
/ ˈtraɪ kroʊˌɪz əm /

noun Crystallography.

pleochroism of a biaxial crystal such that it exhibits three different colors when viewed from three different directions under transmitted light.

Origin of trichroism

First recorded in 1840–50; trichro(ic) + -ism Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for trichroism


/ (ˈtraɪkrəʊˌɪzəm) /


a property of biaxial crystals as a result of which they show a perceptible difference in colour when viewed along three different axesSee pleochroism

Derived Formstrichroic, adjective

Word Origin for trichroism

C19: from Greek trikhroos three-coloured, from tri- + khrōma colour
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