The DICT Development Group
2 definitions found
From The Collaborative International Dictionary of English v.0.48 :
Daltonism \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.
From WordNet (r) 3.0 (2006) :
n 1: dichromacy characterized by a lowered sensitivity to green
light resulting in an inability to distinguish green and
purplish-red [syn: deuteranopia, Daltonism, green-
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