/ Dictionary / Index F fiber optics: Meaning and Definition of Find definitions for: fi'ber op'tics Pronunciation: [key] the branch of optics that deals with the transmission of light through transparent fibers, as in the form of pulses for the transmission of data or communications, or through fiber bundles for the transmission of images. Cf. optical fiber. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fiberoptics (Thesaurus) fiberoptic fiber pen Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language