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Meaning of Daltonsm


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  • inability to perceive or distinguish certain colors, especially red-green color blindness. It has various forms and degrees. John Pringle Nichol
  • achromatopia
- The Nuttall Encyclopedia



Dal"ton*ism (?), n. Inability to perceive or distinguish certain colors, esp. red; color blindness. It has various forms and degrees. So called from the chemist Dalton, who had this infirmity. Nichol.

- Webster's Unabridged Dictionary (1913)



Daltonism, colour-blindness (q. v.). See Dalton, John.
- Wikipedia



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The correct spelling of this word ought to be: Daltonism

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