Meanings
nounprotanopia (usually uncountable, plural protanopias)
plural protanopias
- uncountableusuallymedicineA form of color blindness. Involves a defect in distinguishing between red and green.
Synonyms & antonyms
noundichromacy characterized by lowered sensitivity to long wavelengths of light resulting in an inability to distinguish red and purplish blue
Similar
red-blindness
Broader
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
From proto- (“first (color)”) + an- (“without”) + -opia (“vision”).
Full word history & related roots →Translations
Chinese Mandarin 紅色盲 /红色盲, 甲型色盲
- 紅色盲 /红色盲 (hóngsèmáng)a form of color blindness
- 甲型色盲 (jiǎxíngsèmáng)a form of color blindness
- 第一色盲 (dìyīsèmáng)a form of color blindness
Finnish protanopia, punasokeus
- protanopiaa form of color blindness
- punasokeusa form of color blindness
Japanese 1型色覚
- 1型色覚a form of color blindness
Portuguese protanopia
- protanopiaa form of color blindness
Cite this entry
APA
protanopia. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/protanopia
MLA
“protanopia.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/protanopia. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “protanopia,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/protanopia.
Source: protanopia on Wiktionary, CC BY-SA 4.0.