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Dictionary

chromat'ic aberra'tion

Optics.
the variation of either the focal length or the magnification of a lens system with different wavelengths of light, characterized by prismatic coloring at the edges of the optical image and color distortion within it. Also called chromatism.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

chromatic

chromaticism

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