protanopia protanope • protanopic · · · Info · Definitions · Synonyms · Characters · · protanopia · · Text Latin · · Script 10 · · Length 5 · · Syllables Definitions · · · (noun) dichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue. Synonyms: red-blindness. · · Noun Definition 1 Synonyms · · · red-blindness · · Synonym 1 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074