so·​di·​um | \ ˈsō-dē-əm How to pronounce sodium (audio) \

Definition of sodium

: 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 — see Chemical Elements Table

Examples of sodium in a Sentence

Recent Examples on the Web Because sodium has a much higher boiling temperature than water, the coolant would not have to be pressurized, reducing the plant’s complexity and cost. Adrian Cho, Science | AAAS, "Department of Energy picks two advanced nuclear reactors for demonstration projects," 16 Oct. 2020 Loaded with fat and excess sodium, calories in sweet potato fries from a restaurant can be upwards of 350 for just one cup's worth. Good Housekeeping, "All of the Nutritional Facts and Health Benefits of Sweet Potatoes," 30 Sep. 2020 Too much sodium is bad for those with high blood pressure. Jennifer Rude Klett, Milwaukee Journal Sentinel, "Are You Ready For Some Football Food? In The Kitchen With LeRoy Butler," 9 Sep. 2020 After a day working outside in the sun, pickling liquid is a great pick-me-up and helps replenish potassium and sodium. Patricia S York, Southern Living, "How To Make the Best Bread-and-Butter Pickles," 28 Aug. 2020 In the kidneys and intestine, SGLT1 uses sodium to carry glucose into cells to provide them with energy. Ian Randall, Science | AAAS, "Why adding salt makes fruit—and candy—sweeter," 6 Oct. 2020 Interestingly, draining alone results in a 36% reduction in sodium. Darlene Zimmerman, Detroit Free Press, "Healthful substitutions cut fat and salt — but not flavor— in taco-inspired dish," 4 Oct. 2020 Hix said 5,000 gallons of sodium hydrosulfite has spilled onto the ground. Carol Robinson |, al, "Overturned 18-wheeler, 5,000 gallon sodium hydrosulfite spill shuts down I-59 in Birmingham," 1 Oct. 2020 The increase in sodium and water retention leads to swelling and high blood pressure. Beth Mole, Ars Technica, "Rare case of black licorice poisoning kills man in Massachusetts," 25 Sep. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sodium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of sodium

1807, in the meaning defined above

History and Etymology for sodium

New Latin, from English soda

Keep scrolling for more

Learn More about sodium

Time Traveler for sodium

Time Traveler

The first known use of sodium was in 1807

See more words from the same year

Statistics for sodium

Last Updated

27 Oct 2020

Cite this Entry

“Sodium.” Dictionary, Merriam-Webster, Accessed 28 Oct. 2020.

Keep scrolling for more

More Definitions for sodium


How to pronounce sodium (audio)

English Language Learners Definition of sodium

: a soft silver-white element that is found in salt, baking soda, and other compounds


so·​di·​um | \ ˈsō-dē-əm How to pronounce sodium (audio) \

Kids Definition of sodium

: a soft waxy silver-white chemical element occurring in nature in combined form (as in salt)


so·​di·​um | \ ˈsōd-ē-əm How to pronounce sodium (audio) \

Medical Definition of sodium

: 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

Keep scrolling for more

More from Merriam-Webster on sodium

Nglish: Translation of sodium for Spanish Speakers

Britannica English: Translation of sodium for Arabic Speakers Encyclopedia article about sodium

Comments on sodium

What made you want to look up sodium? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Namesakes Word Quiz

  • a citrus fruit possibly named after a person
  • Which of the following is a fruit named after a Moroccan seaport?
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!