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

While the hot-cold cycles didn’t completely erase the tension of being confined in a car with my kids, sneaking away to the adults-only mineral pools — one enriched with magnesium, another with potassium — was a nice reset. — Jamie Siebrase, Denver Post, 20 Aug. 2026

If not properly administered and monitored, an unsafe amount of potassium entering the body can lead to cardiac arrhythmia, kidney dysfunction, muscle weakness or spasms, metabolic disturbances or death, according to Ameri Pharma. — Bailey Richards, PEOPLE, 19 Aug. 2026

Coconut water provides fluids along with electrolytes, such as potassium, that your body needs for recovery. — Abby Norman, Verywell Health, 17 Aug. 2026

This weekend, Sacramento is getting its fill of potassium, and then some. — Camila Pedrosa, Sacbee.com, 15 Aug. 2026

Word History

Etymology

New Latin, from potassa potash, from English potash

First Known Use

circa 1807, in the meaning defined above

Phrases Containing potassium

• potassium-argon
• potassium bromide
• potassium carbonate
• potassium chlorate
• potassium chloride
• potassium cyanide
• potassium dichromate
• potassium hydroxide
• potassium iodide
• potassium nitrate
• potassium permanganate
• potassium sorbate
• potassium sulfate

Kids 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