/ Dictionary / Index T tetrafluoride: Meaning and Definition of Find definitions for: tet•ra•fluor•ide Pronunciation: (te"tru-floor'īd, -flôr'-, -flōr'-), [key] — n. Chem. a fluoride containing four fluorine atoms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tetraethyl pyrophosphate tetrafluoroethylene Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language