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.

Origin of color blindness

First recorded in 1835–45 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for color blindness

Historical Examples of color blindness

  • In comparing notes with my Philosopher I am chagrined at my own color-blindness.

    By the Christmas Fire

    Samuel McChord Crothers

  • Color-blindness is not a defect of the eye, but a defect of the brain.

    How to Become Rich

    William Windsor

  • In color-blindness, the system is reduced to one or two dimensions, instead of three.


    Robert S. Woodworth

  • It is a case of color-blindness, as it were—supposing you two were colors.

    Rodman the Keeper

    Constance Fenimore Woolson

  • Apart from color-blindness and such possibilities, we see the Hall in different perspectives.

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

Medicine definitions for color blindness

color blindness


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.