/ Dictionary / Index D dioptric: Meaning and Definition of Find definitions for: di•op•tric Pronunciation: (dī-op'trik), [key] — adj. pertaining to dioptrics: dioptric images. noting or pertaining to refraction or refracted light. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dioptometer dioptrics Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language