Meaning of achromatism

a•chro•ma•tism

Pronunciation: (ā-krō'mu-tiz"um), [key]
— n. Optics.
  1. freedom from color.
  2. freedom from chromatic aberration, as in an achromatic lens.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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