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protanopia
pro·ta·no·pi·a [ prtə nṓpee ə ]


noun 
Definition:
 
form of color blindness: a form of color blindness in which the retina fails to distinguish between red and green
[Early 20th century. <proto- (red being regarded as the first of the primary colors) + an-]

pro·ta·nop·ic [ prtə nóppik ] adjective
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