/ Dictionary / Index C catoptrics: Meaning and Definition of Find definitions for: ca•top•trics Pronunciation: (ku-top'triks), [key] — n. (used with a sing. v.) the branch of optics dealing with the formation of images by mirrors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: catoptrics (Thesaurus) Catonsville catouse Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language