Meaning of SODIUM in English

so ‧ di ‧ um /ˈsəʊdiəm $ ˈsoʊ-/ BrE AmE 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

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.