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tritanopia

[trahyt-n-oh-pee-uh]
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noun Ophthalmology.
  1. a defect of vision in which the retina fails to respond to blue and yellow.
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Origin of tritanopia

< New Latin, equivalent to trit- (< Greek trítos third) + an- an-1 + -opia -opia
Related formstrit·an·op·ic [trahyt-n-op-ik] /ˌtraɪt nˌɒp ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for tritanopia

tritanopia

noun
  1. a form of colour blindness in which there is a tendency to confuse blues and greens and in which sensitivity to blue is reduced
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Derived Formstritanopic (ˌtraɪtəˈnɒpɪk, ˌtrɪt-), adjective

Word Origin

C19/20: from New Latin, from Greek tritos third + New Latin anopia blindness; signifying that only two thirds of the spectrum can be distinguished
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

tritanopia in Medicine

tritanopia

(trī′tə-nōpē-ə)
n.
  1. A deficiency in color preception characterized by an inability to discern blue and yellow due to an absence of blue-sensitive pigment in the retina.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.