/ Dictionary / Index P potassium permanganate: Meaning and Definition of Find definitions for: potas'sium perman'ganate Pronunciation: [key] — Chem. Chem. a very dark purple, crystalline, water-soluble solid, KMnO, used chiefly as an oxidizing agent, disinfectant, laboratory reagent, and in medicine as an astringent and antiseptic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potassium oxalate potassium phosphate Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language