colour blindness 1
noundomain: state
Princeton WordNet [ver.3.1]
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EnglishDefinition
genetic inability to distinguish differences in hue
Hypernym
birth defect 1
noun
a defect that is present at birth
impairment of the sense of sight
EnglishHyponym
dichromacy 1
noun
a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision)
monochromacy 1
noun
complete color blindness; colors can be differentiated only on the basis of brightness
