Aspheric Definition
ā-sfîrĭk, ā-sfĕr-
adjective
Varying slightly from sphericity and having only slight aberration, as a lens.
American Heritage
Designating or of a lens or mirror made so that it is not perfectly spherical, as to minimize spherical aberration.
Webster's New World
Wiktionary
Synonyms:
Origin of Aspheric
-
a- + spheric
From Wiktionary
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