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catoptrics

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WordReference Random House Unabridged Dictionary of American English © 2025

ca•top•trics n. (used with a sing. v.)

Opticsthe branch of optics dealing with the formation of images by mirrors.

Greek katoptrikós, equivalent. to kátoptr(on) mirror (kat- cat- + op- see + -tron suffix of instruments) + -ikos -ic; see -ics
1560–70

ca•top′tric, ca•top′tri•cal, adj.
ca•top′tri•cal•ly, adv.

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