/ Dictionary / Index P potassium oxalate: Meaning and Definition of Find definitions for: potas'sium ox'alate Pronunciation: [key] — Chem. Chem. a colorless, crystalline, water-soluble, poisonous solid, KCO&multiplydot;HO, used chiefly as a bleaching agent and in medical tests as an anticoagulant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potassium nitrate potassium permanganate 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