柯林斯詞典potassium /p??t?s??m/ 1. N-UNCOUNT Potassium is a soft silvery-white chemical element that occurs mainly in compounds. These compounds are used in making such things as glass, soap, and fertilizers. 鉀 返回 potassium劍橋詞典a silver-white chemical element that, when combined with other elements , is used in the production of soap , glass , and fertilizers (= substances that help plants to grow ) 鉀 返回 potassium