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Meaning of aspherical

a•spher•i•cal

Pronunciation: (ā-sfer'i-kul), [key]
— adj. Optics.
  1. (of a reflecting surface or lens) deviating slightly from a perfectly spherical shape and relatively free from aberrations.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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