One of the mysteries of the English language finally explained.
- another term for protanopia, a form of colour blindness
- ‘It is one of the tests of reference to screen daltonism.’
- ‘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.’
Mid 19th century: from the name of John Dalton, John + -ism.
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