Definition of potassium noun from the Oxford Advanced Learner's Dictionary



BrE BrE//pəˈtæsiəm//
; NAmE NAmE//pəˈtæsiəm//
[uncountable] (symbol K)
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a chemical element. Potassium is a soft silver-white metal that exists mainly in compounds which are used in industry and farming. Word Originearly 19th cent.: from potash (earlier potass, from French potasse) + -ium.
See the Oxford Advanced American Dictionary entry: potassium