achromatism

[ ey-kroh-muh-tiz-uhm ]

/ eɪˈkroʊ məˌtɪz əm /

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noun Optics.

freedom from color.

freedom from chromatic aberration, as in an achromatic lens.

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Also achromaticity.

Origin of achromatism

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

Words nearby achromatism

achromatic colour, achromaticity, achromatic lens, achromatic prism, achromatin, achromatism, achromatize, achromatophil, achromatophilia, achromatopsia, achromatous

How to use achromatism in a sentence

The low dispersive power of water masks, as Helmholtz has remarked, the imperfect achromatism of the eye.
Six Lectures on Light|John Tyndall
Thus examined, the departure of the eye from achromatism appears very gross indeed.
Six Lectures on Light|John Tyndall
These phenomena are fully explained by the imperfect achromatism of the eye.
Curiosities of Light and Sight|Shelford Bidwell
The achromatism of prisms depends upon the same principles, and it is effected in the same way as that of lenses.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley

It would seem that the eye is but little sensitive to colours thus presented, perhaps on account of its own want of achromatism.
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 6|Various