so·di·um
noun/ˈsəʊdiəm/
/ˈsəʊdiəm/
[uncountable] (symbol Na)
- a chemical element. Sodium is a soft silver-white metal that is found naturally only in compounds, such as salt.
钠 Oxford Collocations DictionarySodium is used before these nouns:- salt
Word Originearly 19th cent.: from soda + -ium.