[ ey-kroh-muh-tiz-uh m ]
/ eɪˈkroʊ məˌtɪz əm /

noun Optics.

freedom from color.
freedom from chromatic aberration, as in an achromatic lens.

Origin of achromatism

First recorded in 1790–1800; achromat(ic) + -ism Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for achromatism

Medicine definitions for achromatism


[ ā-krōmə-tĭz′əm, ə-krō- ]


The quality of being achromatic.
The correction of chromatic aberration by combining lenses of different refractive indexes and different dispersion.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.