Definition of sodium carbonate noun from the Oxford Advanced American Dictionary

 

sodium carbonate

 noun
noun
 
(also ˈwashing ˌsoda)[uncountable](symbol Na2CO3)
 
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a chemical in the form of white crystals or powder that dissolves and is used in making glass, soap, and paper, and for making water soft
See the Oxford Advanced Learner's Dictionary entry: sodium carbonate