daltonism

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Daltonism^¹

/ˈdɔːltənɪzəm/ UK

Where it comes from

From Dalton + -ism. Named after John Dalton (1766–1844), who suffered from the condition and conducted early research on it.

noun daltonism

uncountable An inability or defective ability to perceive or distinguish certain colors, especially red-green color blindness. A person with Daltonism may be said to lack a discriminatory power that others have: his perceptions of red and green are, as such, not to be relied on.
Similar: color blindness, dichromatism
uncountable Achromatopsia.

daltonism^²

noun

uncountable Alternative letter-case form of Daltonism

Translations

Every language

noun red-green color blindness

Español	daltonismo
Português	daltonismo
Français	daltonisme
Deutsch	Rot-Grün-Blindheit
Italiano	daltonismo
Ελληνικά	δαλτονισμός daltonismós, αχρωματοψία achromatopsía
Русский	дальтони́зм dalʹtonízm

noun achromatopsia

Ελληνικά	αχρωματοψία achromatopsía

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Cite this

MLA

"daltonism." Wiktionary, via Micwyn, micwyn.com/word/daltonism. Accessed 7 Nov. 2026.

APA

daltonism. (n.d.). In Wiktionary, via Micwyn. Retrieved November 7, 2026, from https://micwyn.com/word/daltonism

Chicago

"daltonism." Wiktionary, via Micwyn. Accessed November 7, 2026. https://micwyn.com/word/daltonism.

BibTeX

@misc{daltonism_2026,
  title = {daltonism},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/daltonism},
  urldate = {2026-11-07}
}