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protanopia

[proht-n-oh-pee-uh]
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noun Ophthalmology.
  1. a defect of vision in which the retina fails to respond to red or green.
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Origin of protanopia

From New Latin, dating back to 1900–05; see origin at prot-, an-1, -opia
Related formspro·ta·nop·ic [proht-n-op-ik] /ˌproʊt nˈɒp ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for protanopia

protanopia

noun
  1. a form of colour blindness characterized by a tendency to confuse reds and greens and by a loss of sensitivity to red light
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Derived Formsprotanopic (ˌprəʊtəˈnɒpɪk), adjective

Word Origin

C20: New Latin, from proto- + an- + -opia
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
protanopia in Medicine

protanopia

(prō′tə-nō′pē-ə)
n.
  1. A form of colorblindness characterized by defective perception of red and confusion of red with green or bluish green.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.