aspherical: Meaning and Definition of

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.
See also: