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Line breaks: so¦dium
Pronunciation: /ˈsəʊdɪəm

Definition of sodium in English:


[mass noun]
The chemical element of atomic number 11, a soft silver-white reactive metal of the alkali-metal group. (Symbol: Na)
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.



adjective ( Mineralogy )
Example sentences
  • A scintillometer could make a radiometric survey at the same time which would distinguish potassic from sodic granites.
  • The Lake George center, for instance, had three emplacements, one potassic, another sodic, and yet another with a mixed composition.
  • There are no secondary sodic phases present, and no observed albitization of potassium feldspar, suggesting only limited Na mobility.

Definition of sodium in:

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