[mon-uh-kroh-muh-tiz-uh m]
  1. the quality of having one color: the monochromatism of Picasso's Blue Period.
  2. Ophthalmology. a defect of vision in which the retina fails to perceive color.Compare dichromatism(def 2), trichromatism(def 3).
Also mono·chro·ma·sia. [mon-uh-kroh-mey-zhuh, ‐zee-uh, ‐shuh, ‐shee-uh] /ˌmɒn ə kroʊˈmeɪ ʒə, ‐zi ə, ‐ʃə, ‐ʃi ə/, mon·o·chro·ma·cy.

Origin of monochromatism

First recorded in 1860–65; mono- + chromatism Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for monochromatism


  1. a visual defect in which all colours appear as variations of a single hue
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

monochromatism in Medicine


  1. The state of having or exhibiting only one color.
  2. achromatopsia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.