/ Dictionary / Index T triphosphate: Meaning and Definition of Find definitions for: tri•phos•phate Pronunciation: (trī-fos'fāt), [key] — n. Chem. a salt derived from triphosphoric acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triphibious triphosphoric acid Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language