potassium
noun
po·tas·si·um
pə-ˈta-sē-əm 
often attributive
: 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
Magnesium and potassium help relax blood vessels and reduce sodium’s effects in the body.
—
Jillian Kubala, Health, 11 May 2026
Asparagus contains potassium, antioxidants, folate, and other bioactive compounds that reduce oxidative stress and improve blood vessel function.
—Md Published, Verywell Health, 11 May 2026
Best Fertilizers for Fruit Trees Fertilizers with an NPK (nitrogen, phosphorus, and potassium) ratio of 10-10-10 are widely used to fertilize fruit trees, as these nutrients are essential for healthy growth, developing a strong root system, and producing fruit.
—Sj McShane, Martha Stewart, 10 May 2026
These typically contain minerals like sodium, potassium and magnesium, which help the body maintain fluid balance — the same reason athletes reach for sports drinks after a hard workout.
—Lauren Jarvis-Gibson, Sacbee.com, 7 May 2026
See All Example Sentences for potassium
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Jillian Kubala, Health, 11 May 2026
Asparagus contains potassium, antioxidants, folate, and other bioactive compounds that reduce oxidative stress and improve blood vessel function.
—Md Published, Verywell Health, 11 May 2026
Best Fertilizers for Fruit Trees Fertilizers with an NPK (nitrogen, phosphorus, and potassium) ratio of 10-10-10 are widely used to fertilize fruit trees, as these nutrients are essential for healthy growth, developing a strong root system, and producing fruit.
—Sj McShane, Martha Stewart, 10 May 2026
These typically contain minerals like sodium, potassium and magnesium, which help the body maintain fluid balance — the same reason athletes reach for sports drinks after a hard workout.
—Lauren Jarvis-Gibson, Sacbee.com, 7 May 2026
See All Example Sentences for potassium
Cite this Entry
“Potassium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/potassium. Accessed 14 May. 2026.
Copy CitationKids Definition
potassium
noun
po·tas·si·um
pə-ˈtas-ē-əm
: a silver-white soft light metallic element that has a low melting point and occurs abundantly in nature especially combined in minerals see element
Medical Definition
potassium
noun
po·tas·si·um
pə-ˈtas-ē-əm
: 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
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