/ Dictionary / Index P potassium cyanide: Meaning and Definition of Find definitions for: potas'sium cy'anide Pronunciation: [key] — Chem. Chem. a white, granular, water-soluble, poisonous powder, KCN, having a faint almondlike odor, used chiefly in metallurgy and photography. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potassium cobaltinitrite potassium dichromate Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language