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op·ti·cal

optical

 
pronunciation:
ap tih kl
features:
Word Combinations (adjective), Word Explorer, Word Parts
part of speech: adjective
definition 1: of or having to do with the sense of sight or the eye.
Optical tests tell you whether or not you need glasses.
definition 2: meant to make vision better.
Glasses are optical devices made to correct a problem with seeing.
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derivation: optically (adv.)
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  nerve, physics, sense
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