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

During the growing season, remember to supply the tree with a potassium-rich fertilizer to support its development. — Sj McShane, Martha Stewart, 22 June 2026

Canned pineapple is a naturally sweet way to top cottage cheese (which is also high in potassium), and the juice from the can replaces OJ as a breakfast beverage. — Mira Miller, Verywell Health, 21 June 2026

Plenty of sunlight, water, and potassium-rich fertilizers are essential for healthy fruit production. — Nishaa Sharma, The Spruce, 20 June 2026

Wild salmon, for example, contains proteins, vitamins A, D and B-12, and critical minerals such as selenium and potassium — as well as high-quality omega-3s. — Sandee Lamotte, CNN Money, 18 June 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