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dichromatism

[dahy-kroh-muh-tiz-uh m]
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noun
  1. the quality or state of being dichromatic.
  2. 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. 2018

dichromatism in Medicine

dichromatism

(dī-krōmə-tĭz′əm)
n.
  1. The state of being dichromatic.
  2. 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
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.