so‧di‧um /ˈsəʊdiəm $ ˈsoʊ-/ noun [uncountable]
[Date: 1800-1900; Language: Modern Latin; Origin: soda]
a common silver-white metal that usually exists in combination with other substances, for example in salt. It is a chemical element: symbol Na

[TahlilGaran] Dictionary of Contemporary English ▲