/ Dictionary / Index P potassium fluoride: Meaning and Definition of Find definitions for: potas'sium fluor'ide Pronunciation: [key] — Chem. Chem. a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potassium ferrocyanide potassium hydroxide 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