Rochelle salt Hear it!

Rochelle salt definition

Ro·chelle· salt (rō s̸hel′)

a colorless crystalline compound, potassium sodium tartrate, KNaCHO·4HO, used as a laxative, in baking powders, and, in electronics, as a piezoelectric material

Etymology: after La Rochelle, France, where discovered

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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