washing soda
noun /ˈwɒʃɪŋ səʊdə/
/ˈwɑːʃɪŋ səʊdə/
(also sodium carbonate)
[uncountable] (symbol Na2CO3)
- a chemical in the form of white crystals or powder that dissolves (= turns to liquid when mixed with another liquid) and is used in making glass, soap and paper, and for making water soft
碳酸钠