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optics: Meaning and Definition of

op•tics

Pronunciation: (op'tiks), [key]
— n. (used with a sing. v.)
  1. the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
optic nerve optimal
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