/ Dictionary / Index F fiberoptic: Meaning and Definition of Find definitions for: fi•ber•op•tic Pronunciation: (fī"bur-op'tik), [key] — adj. of or pertaining to instruments utilizing fiber optics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fiberoptic (Thesaurus) fiberize fiber optics Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language