aspherical(redirected from Aspherical (disambiguation))
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a·spher·ic(ā-sfîr′ĭk, ā-sfĕr′-) also a·spher·i·cal (-ĭ-kəl)
Varying slightly from sphericity and having only slight aberration, as a lens.
a•spher•i•cal(eɪˈsfɛr ɪ kəl, eɪˈsfɪər-)
(of a reflecting surface or lens) deviating slightly from a perfectly spherical shape and relatively free from aberrations.