/ Dictionary / Index R Rochelle salt: Meaning and Definition of Find definitions for: Rochelle' salt" Pronunciation: [key] — Chem., Pharm. Chem.,Pharm. a colorless or white, water-soluble solid, KNaCHO&multiplydot;4HO, used in silvering mirrors, in the manufacture of Seidlitz powders and baking powder, and in medicine as a laxative. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rochelle powders roche moutonnée Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language