Daltonism

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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.
     --Nichol.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  Daltonism
       n : dichromacy characterized by a lowered sensitivity to green
           light resulting in an inability to distinguish green and
           purplish-red [syn: {deuteranopia}, {green-blindness}]