Achromatopsy n. : Color blindness; inability to distinguish colors; Daltonism.

Example:


Taxonomy
Dictionary, chro, kro, ey, kroh, muh, Pronunciation, pi, uh, Medical Dictionary, sy, Houghton Mifflin Company, free online English dictionary, word origin, achromatic vision, dictionary results, free online dictionary, definitions.

Defination from the web:
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