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achromatism

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Achromatism
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a⋅chro⋅ma⋅tism

  [ey-kroh-muh-tiz-uhm]
Use achromatism in a Sentence
–noun Optics.
1. freedom from color.
2. freedom from chromatic aberration, as in an achromatic lens.
Also, achromaticity.

Origin:
1790–1800; achromat(ic) + -ism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Achromatism
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ach·ro·mat·ic   (āk'rə-māt'ĭk)   
adj.  

  1. Designating color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black.

  2. Refracting light without spectral color separation.

  3. Biology Difficult to stain with standard dyes. Used in reference to cells or tissues.

  4. Music Having only the diatonic tones of the scale.


[From Greek akhrōmatos : a-, without; see a-1 + khrōma, khrōmat-, color.]
ach'ro·mat'i·cal·ly adv., a·chro'ma·tism (ā-krō'mə-tĭz'əm), a·chro'ma·tic'i·ty (-tĭs'ĭ-tē) n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: achro·ma·tism
Pronunciation: (')A-'krO-m&-"tiz-&m, a-
Function: noun
: the quality or state of being achromatic
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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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