Definition of sodium bicarbonate noun from the Oxford Advanced American Dictionary

 

sodium bicarbonate

 noun
noun
 
(also bicarbonate of soda, baking soda, informal bicarb)[uncountable](symbol NaHCO3)
 
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a chemical in the form of a white powder that dissolves and is used in baking to make cakes, etc. rise and become light, and in making carbonated drinks and some medicines
See the Oxford Advanced Learner's Dictionary entry: sodium bicarbonate