so·di·um | \ˈsō-dē-əm \

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

There was also a lot of iron, calcium, zinc, magnesium and sodium—substances consistent with the consumption of red meat or dairy products. The Economist, "A mummy’s final meal adds to an ancient mystery," 12 July 2018 Topics covered include medication management, blood glucose monitoring, exercise, complication prevention, and nutrition with an emphasis on carbohydrate counting, sodium and fats. Staff Report, Post-Tribune, "Community news," 11 July 2018 The catering side of the medical center operation was the test ground for the recipes Diaz would eventually start putting into the health system's food-service software program, which measures such things as calories, sodium levels and more. Cathie Anderson, sacbee, "Hospital food gets a farm-to-fork makeover from UC Davis Medical Center's new chef," 18 June 2018 Nutrition | Per serving: 391 calories (19 percent from fat), 8.3 g fat (1.6 g saturated, 3 g monounsaturated), 127 mg cholesterol, 45.9 g protein, 39 g carbohydrates, 7.7 g fiber, 577 mg sodium. Linda Gassenheimer, sacbee, "Making a chicken mango salad? Soon you will get the tang of it," 10 July 2018 Nutrition | Per serving: 565 calories (25 percent from fat), 16 g fat (2.4 g saturated, 6.8 g monounsaturated), 20 mg cholesterol, 23.5 g protein, 77.3 g carbohydrates, 5.6 g fiber, 489 mg sodium. Linda Gassenheimer, charlotteobserver, "Clams and spaghettini make an easy dinner for 2," 6 July 2018 One cup of cooked rice and one egg contain about 265 calories, with 44 grams of carbs, nine grams of protein, five grams of fat, one gram of fiber, and about 500 milligrams of sodium, depending on the recipe. Carly Graf, Outside Online, "The Best Homemade Snacks According to the Pros," 11 May 2018 For example, Evolution Fresh’s Organic Essential Greens, which has celery juice as its first ingredient, contains 300 milligrams of sodium in one 15-ounce bottle. Consumer Reports, Washington Post, "That juice may be green, but it’s not as healthy as you think," 25 June 2018 The food people get at work also tend to have high amounts of sodium and refined grains. Brett Molina, USA TODAY, "All that food at work is making us unhealthy, study finds," 12 June 2018

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

Statistics for sodium

Last Updated

6 Oct 2018

Look-up Popularity

Time Traveler for sodium

The first known use of sodium was in 1807

See more words from the same year

Keep scrolling for more

More Definitions for sodium



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 \

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 \

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

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).


one that holds something together

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!


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!