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dichromatism

[dahy-kroh-muh-tiz-uh m] /daɪˈkroʊ məˌtɪz əm/
noun
1.
the quality or state of being dichromatic.
2.
Also called dichromatopsia
[dahy-kroh-muh-top-see-uh] /daɪˌkroʊ məˈtɒp si ə/ (Show IPA)
. 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).
Origin
1880-1885
1880-85; dichromat(ic) + -ism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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dichromatopsia in Medicine

dichromatism di·chro·ma·tism (dī-krō'mə-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. Also called dichromatopsia, dyschromatopsia, parachromatopsia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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