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Noun: protanopia  `prow-tu'now-pee-u
  1. Dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue
    - red-blindness

Derived forms: protanopias

See also: protanopic

Type of: red-green color blindness [US], red-green colour blindness [Brit, Cdn], red-green dichromacy

Encyclopedia: Protanopia

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