[trahy-kroh-mat-ik, -kruh-]
pertaining to the use or combination of three colors, as in printing or in color photography.
pertaining to, characterized by, or involving three colors.
Ophthalmology. of, pertaining to, or exhibiting normal color vision.
Also, trichromic [trahy-kroh-mik] .

1890–95; tri- + chromatic Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
trichromatic or trichromic (ˌtraɪkrəʊˈmætɪk, traɪˈkrəʊmɪk)
1.  photog, printing involving the combination of three primary colours in the production of any colour
2.  of, relating to, or having normal colour vision
3.  having or involving three colours
trichromic or trichromic

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Medical Dictionary

trichromatic tri·chro·mat·ic (trī'krō-māt'ĭk) or tri·chrome (trī'krōm') or tri·chro·mic (trī-krō'mĭk)

  1. Having or relating to the three primary colors, red, blue, and green.

  2. Having perception of the three primary colors, as in normal vision.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The only thing missing from this explanation is the evolutionary advantage of going trichromatic.
Applicant must be trichromatic and readily able to discern red, green, and yellow.
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