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Definition of dioptric adjective from the Oxford Advanced Learner's Dictionary

dioptric

adjective
 
/daɪˈɒptrɪk/
 
/daɪˈɑːptrɪk/
(physics)
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  1. connected with the scientific study of refraction (= the way light changes direction when it goes through glass, etc.)
halfway
adverb
 
 
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