Definition of sodium in English:


Syllabification: so·di·um
Pronunciation: /ˈsōdēəm


  • The chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group. (Symbol: Na)
    More example sentences
    • Glauconite is close in composition to muscovite but has some iron, magnesium, sodium, and calcium.
    • The second most abundant ion was potassium, followed by sodium, magnesium, manganese and iron.
    • For example, lithium, sodium, and potassium comprised a triad of soft, highly reactive metals.


early 19th century: from soda + -ium.

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