natrium Chem. rare.
(ˈneɪtrɪəm, ˈnætrɪəm)
[f. natr-on + -ium.]
Sodium.
| 1842 Francis Dict. Arts & Sci., Natrium, the name given by the German chemists to sodium, the metallic base of soda. 1870 Garrod Mat. Med. (ed. 3) 131 Sodium..called also Natrium, is contained in the soda salts, but does not exist native. |