trichromatism

[ trahy-kroh-muh-tiz-uhm ]
/ traɪˈkroʊ məˌtɪz əm /

noun

the quality or condition of being trichromatic.
the use or combination of three colors, as in printing or photography.
Ophthalmology. normal color vision.Compare monochromatism (def. 2), dichromatism (def. 2).

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Origin of trichromatism

First recorded in 1885–90; trichromat(ic) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for trichromatism

trichromatism
/ (traɪˈkrəʊməˌtɪzəm) /

noun

the use or combination of three primary colours for colour reproduction in photography, printing, television, etc
rare the state of being trichromatic
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