/ Dictionary / Index P potassium hydroxide: Meaning and Definition of Find definitions for: potas'sium hydrox'ide Pronunciation: [key] — Chem. Chem. a white, deliquescent, water-soluble solid, KOH, usually in the form of lumps, sticks, or pellets, that upon solution in water generates heat: used chiefly in the manufacture of soap, as a laboratory reagent, and as a caustic. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potassium fluoride potassium iodide Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language