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achromatism

American  
[ay-kroh-muh-tiz-uhm] / eɪˈkroʊ məˌtɪz əm /

noun

Optics.
  1. freedom from color.

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


Etymology

Origin of achromatism

First recorded in 1790–1800; achromat(ic) + -ism

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

He will find that he has not given exactly the proper curves to secure achromatism.

From Side-Lights on Astronomy and Kindred Fields of Popular Science by Simon Newcomb

If all three constants of reproduction be achromatized, then the Gaussian image for all distances of objects is the same for the two colours, and the system is said to be in ``stable achromatism.''

From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg

A long list of indictments might indeed be brought against the eye—its opacity, its want of symmetry, its lack of achromatism, its partial blindness.

From Six Lectures on Light Delivered In The United States In 1872-1873 by John Tyndall

Most insects, when exposed for any length of time to strong light, fade or lose color, and the only way to prevent such achromatism is to exclude the light.

From Directions for Collecting and Preserving Insects by C. V. Riley

The state or quality of being achromatic; as, the achromatism of a lens; achromaticity.

From Webster's Unabridged Dictionary by Noah Webster

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