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dioptric

adjective

di·​op·​tric dī-ˈäp-trik How to pronounce dioptric (audio)
: refractive
specifically : assisting vision by refracting and focusing light

Word History

Etymology

Greek dioptrikos of a diopter (instrument), from dioptra

First Known Use

1653, in the meaning defined above

Time Traveler
The first known use of dioptric was in 1653

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