Synonyms

daltonism

American

[dawl-tn-iz-uhm] / ˈdɔl tnˌɪz əm /

noun

(sometimes initial capital letter)

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

daltonism British

/ ˈdɔːltəˌnɪzəm, dɔːlˈtɒnɪk /

noun

colour blindness, esp the confusion of red and green

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

daltonic

adjective

Etymology

Origin of daltonism

1835–45; J. Dalton + -ism

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The singular incapacity of distinguishing colours, which has been called DALTONISM, is notoriously hereditary, and has been traced through five generations, in which it was confined to the female sex.

From The Variation of Animals and Plants under Domestication — Volume 1 by Darwin, Charles

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023