Sodium discovered in new cavity

Wikipedia Word definitions in Wikipedia
Natrium is the Latin name of sodium. It may also refer to: Chrysler Natrium Natrium, West Virginia

Wiktionary Word definitions in Wiktionary
n. (context chiefly obsolete rare English) sodium.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Sodium \So"di*um\, n. [NL., fr.E. soda.] (Chem.) A common metallic element of the alkali group, in nature always occuring combined, as in common salt, in albite, etc. It is isolated as a soft, waxy, white, unstable metal, so highly reactive that it combines ...