noun, often attributive
po·​tas·​si·​um | \ pə-ˈta-sē-əm How to pronounce potassium (audio) \

Definition of potassium

: a silver-white soft light low-melting monovalent metallic element of the alkali metal group that occurs abundantly in nature especially combined in minerals — see Chemical Elements Table

Examples of potassium in a Sentence

Recent Examples on the Web Some medicines for lung congestion due to heart failure (such as many diuretics) can deplete potassium and magnesium. Dr. Keith Roach, oregonlive, 9 June 2021 It is packed with minerals from water from the Dead Sea as well as magnesium, potassium and calcium. Chris Hachey, BGR, 19 May 2021 Plants also need nutrients such as potassium and phosphorus to grow. Washington Post, 17 May 2021 Potassium is a vital nutrient for plants, and potassium and cesium atoms happen to have a similar structure. Alex Fox, Smithsonian Magazine, 24 Apr. 2021 Rich in vitamin C, folate, potassium and fiber, berries also provide an abundance of phytonutrients. Darlene Zimmerman, Detroit Free Press, 10 Apr. 2021 At this point, the mixture has sufficient nitrogen but still requires potassium and phosphates. D.x. Fenten, Popular Mechanics, 20 Mar. 2021 The next morning the patient’s potassium was normal; so were her kidneys. New York Times, 2 June 2021 After a sweaty workout, pickle juice can replenish electrolytes (essential minerals like sodium, potassium and magnesium) and help you get hydrated again. Washington Post, 1 May 2021

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

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First Known Use of potassium

circa 1807, in the meaning defined above

History and Etymology for potassium

New Latin, from potassa potash, from English potash

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Learn More About potassium

Time Traveler for potassium

Time Traveler

The first known use of potassium was circa 1807

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Statistics for potassium

Last Updated

17 Jun 2021

Cite this Entry

“Potassium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/potassium. Accessed 17 Jun. 2021.

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More Definitions for potassium



English Language Learners Definition of potassium

: a soft, silver-white metal that is used especially in farming and industry


po·​tas·​si·​um | \ pə-ˈta-sē-əm How to pronounce potassium (audio) \

Kids Definition of potassium

: a silvery soft light metallic chemical element found especially in minerals


po·​tas·​si·​um | \ pə-ˈtas-ē-əm How to pronounce potassium (audio) \

Medical Definition of potassium

: a silver-white soft light low-melting monovalent metallic element of the alkali metal group that occurs abundantly in nature especially combined in minerals symbol K — see Chemical Elements Table

More from Merriam-Webster on potassium

Nglish: Translation of potassium for Spanish Speakers

Britannica English: Translation of potassium for Arabic Speakers

Britannica.com: Encyclopedia article about potassium


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