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

People with certain medical conditions, like chronic kidney disease or advanced heart failure, should consult a healthcare provider before increasing potassium. —Mira Miller, Verywell Health, 14 June 2026

This will also reveal if the soil is too acidic and needs lime or is lacking potassium, which, according to Furman, may result in smaller blossoms. —Nadia Hassani, The Spruce, 12 June 2026

Fiber slows digestion, protein supports fullness, and potassium helps with hydration and muscle function. —Randi Gollin, Martha Stewart, 10 June 2026

People with kidney disease or certain blood pressure conditions are often advised to consult their doctors before consuming large amounts because of their potassium and sodium content. —Anthony Thompson, USA Today, 9 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