aspherical

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a·spher·ic

 (ā-sfîr′ĭk, ā-sfĕr′-) also a·spher·i·cal (-ĭ-kəl)
adj.
Varying slightly from sphericity and having only slight aberration, as a lens.

a•spher•i•cal

(eɪˈsfɛr ɪ kəl, eɪˈsfɪər-)

also a•spher′ic,



adj.
(of a reflecting surface or lens) deviating slightly from a perfectly spherical shape and relatively free from aberrations.
[1920–25]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.aspherical - varying slightly from a perfectly spherical shape
optics - the branch of physics that studies the physical properties of light
rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders"