baking soda Hear it!

baking soda definition

☆ baking soda

a white powder, sodium bicarbonate, NaHCO, used as a leavening agent, antacid, and mouthwash, and in fire extinguishers

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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