Aspherical definitions

Aspherical

1) Aspheric 2) Rounded
Found on https://www.crosswordclues.com/clue/aspherical

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aspherical

Any curved surface that is not spherical, e.g. elliptical
Found on http://eyediologyopticians.co.uk/pages/Eye-terms-explained.html

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aspherical

(of a reflecting surface or lens) deviating slightly from a perfectly spherical shape and relatively free from aberrations.
Found on https://www.infoplease.com/dictionary/aspherical

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