baking soda
noun/ˈbeɪkɪŋ səʊdə/
/ˈbeɪkɪŋ səʊdə/
(also bicarbonate of soda, sodium bicarbonate, informal bicarb)
[uncountable] (symbol NaHCO3)
- a chemical in the form of a white powder that dissolves (= becomes a liquid or forms part of a liquid) and is used in baking to make cakes, etc. rise and become light, and in making fizzy drinks and some medicines
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baking soda