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daltonism

[dawl-tn-iz-uh m] /ˈdɔl tnˌɪz əm/
noun, (sometimes initial capital letter) Pathology
1.
color blindness, especially the inability to distinguish red from green.
Origin of daltonism
1835-1845
1835-45; J. Dalton + -ism
Related forms
daltonic
[dawl-ton-ik] /dɔlˈtɒn ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for daltonism
Historical Examples
  • daltonism, dal′ton-izm, n. colour-blindness: inability to distinguish certain colours.

  • Certain authorities on art are said to regard the great Montalbanais as a victim of daltonism—in other words, colour-blind!

    In the Heart of Vosges Matilda Betham-Edwards
  • An interesting example is the common type of color blindness known as daltonism.

    Physiology Ernest G. Martin
  • Colour-blindness or daltonism has been recorded (Horner) through the males only of seven generations.

    The Making of Species Douglas Dewar
  • The diseases known as daltonism or colour-blindness, and hmophilia or the bleeding disease, are certainly hereditary.

    Parenthood and Race Culture Caleb Williams Saleeby
British Dictionary definitions for daltonism

daltonism

/ˈdɔːltəˌnɪzəm/
noun
1.
colour blindness, esp the confusion of red and green
Derived Forms
daltonic (dɔːlˈtɒnɪk) adjective
Word Origin
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
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daltonism in Medicine

daltonism dal·ton·ism (dôl'tə-nĭz'əm)
n.
An inherited defect in the perception of red and green; red-green colorblindness.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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