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TOEFL BNC: 10661 COCA: 12184

potassium

noun
/pəˈtæsiəm/
/pəˈtæsiəm/
[uncountable]
(symbol K)
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  1. a chemical element. Potassium is a soft silver-white metal that exists mainly in compounds which are used in industry and farming.Topics Physics and chemistryc2
    Oxford Collocations DictionaryPotassium is used before these nouns:
    • salt
    See full entry
    Word Originearly 19th cent.: from potash (earlier potass, from French potasse) + -ium.

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