/ Dictionary / Index P persulfate: Meaning and Definition of Find definitions for: per•sul•fate Pronunciation: (pur-sul'fāt), [key] — n. Chem. a salt of persulfuric acid, as potassium persulfate, KSO or KSO. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. persuasive persulfuric acid Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language