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dichromatism

dichromatism Dichromatism is a form of abnormal colour vision in which the range of colour differences a person can perceive is effectively reduced to two basic colour components instead of the fuller normal range.

Dichromatism is a form of abnormal colour vision in which the range of colour differences a person can perceive is effectively reduced to two basic colour components instead of the fuller normal range. In this older usage, it refers to a partial colour-blindness affecting how the spectrum is distinguished.

Also see

Sources

Drafting source: Baldwin Dictionary of Philosophy and Psychology, 1901. 1901 New York Macmillan original; archive index checked 2026-10-18. “Dichromatism” (Dichromatism).
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PsychTerms (psychterms.org), CC BY 4.0, version 1. “dichromatism.” Development preview.

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