protanopia

American

[proht-n-oh-pee-uh] / ˌproʊt nˈoʊ pi ə /

noun

Ophthalmology.

a defect of vision in which the retina fails to respond to red or green.

protanopia British

/ ˌprəʊtəˈnəʊpɪə, ˌprəʊtəˈnɒpɪk /

noun

a form of colour blindness characterized by a tendency to confuse reds and greens and by a loss of sensitivity to red light

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

protanopic

adjective

Etymology

Origin of protanopia

From New Latin, dating back to 1900–05; see origin at prot-, an- ¹, -opia

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023