Definition of daltonism in English:

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Pronunciation: /ˈdôlt(ə)nˌizəm/


Another term for protanopia, a form of color-blindness.
Example sentences
  • The number of colour-blind artists in the history of art is probably larger than usually assumed, bur it is not possible to demonstrate daltonism simply by looking at an artist's pictures.
  • The most common form of colorblindness is daltonism or a problem with red/green.
  • It is one of the tests of reference to screen daltonism.


Mid 19th century: from the name of John Dalton (see Dalton, John) + -ism.

For editors and proofreaders

Syllabification: dal·ton·ism

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