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color blindness

inability to distinguish one or several chromatic colors, independent of the capacity for distinguishing light and shade.
complete inability to distinguish colors of the spectrum, with all objects appearing as shades of gray, black, and white, varying only as to lightness and darkness; achromatopsia.
1835-45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for color blindness
  • There are many things to plan for, such as color blindness, that you can use to help make decisions.
  • As fast and powerful as these listening tests are, they can't quite match color blindness tests.
  • Genetic intervention cures color blindness in monkeys.
  • It is, however a pity that the supporting graphs are making no allowance for color blindness.
  • For individuals without color blindness, the illusions work on their processing abilities--it's color in context.
Word Origin and History for color blindness

1844, replacing Daltonism (after English chemist John Dalton, 1766-1844, who published a description of it in 1794); in figurative use, with reference to race or ethnicity, attested from 1866, American English. Related: color blind (adj.).

Online Etymology Dictionary, © 2010 Douglas Harper
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color blindness in Medicine

color blindness n.
Deficiency of color perception, whether hereditary or acquired, partial or complete.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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