daltonism

American  

[dawl-tn-iz-uhm] / ˈdɔl tnˌɪz əm /

noun

(sometimes initial capital letter)

1. color blindness, especially the inability to distinguish red from green.

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daltonism British  

/ ˈdɔːltəˌnɪzəm, dɔːlˈtɒnɪk /

noun

1. colour blindness, esp the confusion of red and green

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Other Word Forms

• daltonic adjective

Etymology

Origin of daltonism

1835–45; J. Dalton + -ism

Example Sentences

Red-green color vision deficiency is also called Daltonism, after John Dalton, the English chemist from the 1790s.

From Scientific American

Daltonism, the commonest form of color-blindness in which the affected individual is unable to discriminate between red and green.

From Project Gutenberg

Color blindness; inability to distinguish colors; Daltonism.

From Project Gutenberg

In 1794 he was elected a member of the Manchester Literary and Philosophical Society, and a few weeks after election he communicated his first paper on “Extraordinary facts relating to the vision of colours,” in which he gave the earliest account of the optical peculiarity known as Daltonism or colour-blindness, and summed up its characteristics as observed in himself and others.

From Project Gutenberg

Daltonism, dal′ton-izm, n. colour-blindness: inability to distinguish certain colours.—adj.

From Project Gutenberg