Definition of trichromatic
1
: of, relating to, or consisting of three colors
trichromatic light
2a
: relating to or being the theory that human color vision involves three types of retinal sensory receptors
b
: characterized by trichromatism
trichromatic vision
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Merriam-Webster unabridged
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Time Traveler for trichromatic
The first known use of trichromatic was circa 1890
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