/ Dictionary / Index D disulfate: Meaning and Definition of Find definitions for: di•sul•fate Pronunciation: (dī-sul'fāt), [key] — n. Chem. a salt of pyrosulfuric acid, as sodium disulfate, NaSO. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. disubstituted disulfide 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