dichromatism

[ dahy-kroh-muh-tiz-uhm ]
/ daɪˈkroʊ məˌtɪz əm /

noun

the quality or state of being dichromatic.
Also called di·chro·ma·top·si·a [dahy-kroh-muh-top-see-uh]. /daɪˌkroʊ məˈtɒp si ə/. Ophthalmology. a defect of vision in which the retina responds to only two of the three primary colors.Compare monochromatism (def. 2), trichromatism (def. 3).

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Origin of dichromatism

First recorded in 1880–85; dichromat(ic) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for dichromatism

dichromatism
[ dī-krōmə-tĭz′əm ]

n.

The state of being dichromatic.
A form of colorblindness in which only two of the three fundamental colors can be distinguished due to a lack of one of the retinal cone pigments.dichromatopsia dyschromatopsia parachromatopsia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.