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 Farmers typically apply those nutrients — nitrogen, phosphorus and potassium — to crops in the form of chemical fertilizers. New York Times, 17 June 2022 This shampoo also contains ginger oil, which is full of minerals such as magnesium, phosphorus and potassium, which support blood flow to the scalp, promote hair growth and prevent the hair from thinning. Grooming Playbook, The Salt Lake Tribune, 13 June 2022 Additionally, hemp seeds are chock-full of vitamins and minerals like magnesium, calcium, iron, vitamin E, phosphorus, and potassium. Joey Skladany, Better Homes & Gardens, 6 June 2022 One, plants need nitrogen, phosphorus, and potassium. Manasee Wagh, Popular Mechanics, 5 May 2022 This fertilizer will have little or no nitrogen but lots of phosphorus and potassium to promote flowering. Earl Nickel, San Francisco Chronicle, 1 Apr. 2022 The type of fertilizer Brazil imports is a mixture of nitrogen, phosphorus, and potassium known as NPK. Clarisa Diaz, Quartz, 7 Mar. 2022 Our roses need nitrogen, phosphorus and potassium (NPK) which are the essential nutrients for plant growth, also known as primary or macronutrients. Rita Perwich, San Diego Union-Tribune, 5 Mar. 2022 Russia is one of the biggest exporters of the three major groups of fertilizers (nitrogen, phosphorus and potassium). Washington Post, 25 Feb. 2022 See More

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.

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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Time Traveler for potassium

Time Traveler

The first known use of potassium was circa 1807

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Dictionary Entries Near potassium



potassium acid oxalate

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Statistics for potassium

Last Updated

4 Aug 2022

Cite this Entry

“Potassium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/potassium. Accessed 10 Aug. 2022.

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More Definitions for potassium


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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