1
: a silver-white soft waxy ductile element of the alkali metal group with atomic number 11 that occurs abundantly in nature in combined form and is very active chemically see Chemical Elements Table
2
: salt sense 1a, sodium chloride
—not used technically
reduced her sodium intake
a low-sodium diet
Examples of sodium in a Sentence
Recent Examples on the Web
To enhance detection, the plants were treated with sodium tungstate, which amplifies the light emitted by dysprosium.
—
Prabhat Ranjan Mishra, Interesting Engineering, 19 Apr. 2026
Cade realized the players were sweating out electrolytes — another word for minerals like sodium, potassium and magnesium — and upsetting the body’s chemical balance.
—Dee-Ann Durbin, Los Angeles Times, 17 Apr. 2026
Cade realized the players were sweating out electrolytes – another word for minerals like sodium, potassium and magnesium – and upsetting the body’s chemical balance.
—ABC News, 15 Apr. 2026
Unlike traditional lithium-ion batteries that use flammable liquid electrolytes – typically organic carbonates such as ethylene carbonate (EC), dimethyl carbonate (DMC), and diethyl carbonate – this new design is sodium-ion based.
—New Atlas, 15 Apr. 2026
See All Example Sentences for sodium
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Prabhat Ranjan Mishra, Interesting Engineering, 19 Apr. 2026
Cade realized the players were sweating out electrolytes — another word for minerals like sodium, potassium and magnesium — and upsetting the body’s chemical balance.
—Dee-Ann Durbin, Los Angeles Times, 17 Apr. 2026
Cade realized the players were sweating out electrolytes – another word for minerals like sodium, potassium and magnesium – and upsetting the body’s chemical balance.
—ABC News, 15 Apr. 2026
Unlike traditional lithium-ion batteries that use flammable liquid electrolytes – typically organic carbonates such as ethylene carbonate (EC), dimethyl carbonate (DMC), and diethyl carbonate – this new design is sodium-ion based.
—New Atlas, 15 Apr. 2026
See All Example Sentences for sodium
Cite this Entry
“Sodium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sodium. Accessed 22 Apr. 2026.
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Medical Definition
sodium
noun
so·di·um
ˈsōd-ē-əm 
: a silver white soft waxy ductile element of the alkali metal group that occurs abundantly in nature in combined form and is very active chemically
—symbol Na
see Chemical Elements Table
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