sodiumPronunciation: /ˈsəʊdɪəm/Translate sodium | into German | into Italian | into Spanish Definition of sodium noun [mass noun] the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali-metal group. (Symbol: Na)Derivatives sodic adjective ( Mineralogy)Origin: early 19th century: from soda + -iumsodium in other Oxford dictionaries Definition of sodium in the US English dictionary
