protanomaly

[ proht-n-om-uh-lee ]
/ ˌproʊt nˈɒm ə li /

noun Ophthalmology.

a defect of vision characterized by a diminished response of the retina to red.

Origin of protanomaly

First recorded in 1935–40; prot- + anomaly
Related formsprot·a·nom·a·lous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019