/ Dictionary / Index P persulfuric acid: Meaning and Definition of Find definitions for: per'sul•fu'ric ac'id Pronunciation: (pûr'sul-fyoor'ik, pûr"-), [key] — Chem. Chem. Also calleda white, crystalline solid, HSO, used as an oxidizing agent for certain organic compounds. Also calleda white, crystalline solid, HSO, used in the manufacture of hydrogen peroxide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. persulfate pert Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language