achromatism

achromatism

[ey-kroh-muh-tiz-uhm]
noun Optics.
1.
freedom from color.
2.
freedom from chromatic aberration, as in an achromatic lens.


Origin:
1790–1800; achromat(ic) + -ism

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World English Dictionary
achromatic (ˌækrəˈmætɪk)
 
adj
1.  without colour
2.  capable of reflecting or refracting light without chromatic aberration
3.  cytology
 a.  not staining with standard dyes
 b.  of or relating to achromatin
4.  music
 a.  involving no sharps or flats
 b.  another word for diatonic
5.  denoting a person who is an achromat
 
achro'matically
 
adv
 
achromatism
 
n
 
achromaticity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

achromatism a·chro·ma·tism (ā-krō'mə-tĭz'əm, ə-krō'-)
n.

  1. The quality of being achromatic.

  2. 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.
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