/ Dictionary / Index P potassium dichromate: Meaning and Definition of Find definitions for: potas'sium dichro'mate Pronunciation: [key] — Chem. Chem. an orange-red, crystalline, water-soluble, poisonous powder, KCrO, used chiefly in dyeing, photography, and as a laboratory reagent. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potassium cyanide potassium diphosphate 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