dichromatism

noun

di·chro·ma·tism dī-ˈkrō-mə-ˌti-zəm

: partial color blindness in which only two colors are perceptible

Word History

Etymology

dichromat(ic) + -ism

First Known Use

1859, in the meaning defined above

Time Traveler

The first known use of dichromatism was in 1859

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dichromatic

dichromatism

dichromic

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Cite this Entry

Style

“Dichromatism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dichromatism. Accessed 15 Feb. 2026.

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Medical Definition

dichromatism

noun

di·chro·ma·tism dī-ˈkrō-mə-ˌtiz-əm

1

: the state or condition of being dichromatic

2

: partial color blindness in which only two colors are perceptible

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