/ Dictionary / Index D diphosphate: Meaning and Definition of Find definitions for: di•phos•phate Pronunciation: (dī-fos'fāt), [key] — n. Chem. a pyrophosphate. a phosphate containing two phosphate groups. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diphosgene diphosphoglycerate Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language