daltonism

[ dawl-tn-iz-uh m ]

/ ˈdɔl tnˌɪz əm /

noun (sometimes initial capital letter) Pathology.

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

Nearby words

dalton plan, dalton system, dalton's atomic theory, dalton's law, daltonian, daltonism, daly, daly city, dalén, dam, damage

Origin of daltonism

1835–45; J. Dalton + -ism

Related forms

dal·ton·ic

[dawl-ton-ik] /dɔlˈtɒn ɪk/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for daltonic

daltonism

/ (ˈdɔːltəˌnɪzəm) /

noun

colour blindness, esp the confusion of red and green

Derived Forms

daltonic (dɔːlˈtɒnɪk), adjective

Word Origin for daltonism

C19: from French daltonisme, after John Dalton

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

Medicine definitions for daltonic

daltonism

[ dôl′tə-nĭz′əm ]

n.

An inherited defect in the perception of red and green; red-green colorblindness.