1. A light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite
   - K, atomic number 19

Derived forms: potassiums

Type of: metal, metallic element

Part of: brine, carnallite, kainite, langbeinite, saltwater, seawater, sylvine, sylvite

Encyclopedia: Potassium

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