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bicarbonate of soda

noun
🔊/baɪˌkɑːbənət əv ˈsəʊdə/
🔊/baɪˌkɑːrbənət əv ˈsəʊdə/
(also baking soda, sodium bicarbonate, informal bicarb)
[uncountable]
(symbol NaHCO3)
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  1. 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碳酸氢钠；小苏打