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aspherical

[ ey-sfer-i-kuhl ]

adjective

, Optics.
  1. (of a reflecting surface or lens) deviating slightly from a perfectly spherical 1 shape and relatively free from aberrations.


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Word History and Origins

Origin of aspherical1

First recorded in 1920–25; a- 6 + spherical

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asphaltumaspherical surface