Dictionary
Rochelle' salt"
Chem., Pharm.
a colorless or white, water-soluble solid, KNaC
4H
4O
6·4H
2O, used in silvering mirrors, in the manufacture of Seidlitz powders and baking powder, and in medicine as a laxative. Also called
potassium sodium tartrate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.