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dichromatopsia

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di⋅chro⋅ma⋅tism

  [dahy-kroh-muh-tiz-uhm]
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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] . 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:
1880–85; dichromat(ic) + -ism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Medical Dictionary

Main Entry: di·chro·ma·tism
Pronunciation: dI-'krO-m&-"tiz-&m
Function: noun
1 : the state or condition of beingdichromatic
2 : partial color blindness in which only two colors are perceptible

Main Entry: di·chro·ma·top·sia
Pronunciation: (")dI-"krO-m&-'täp-sE-&
Function: noun
: DICHROMATISM 2
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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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