柯林斯詞典plutonium /plu??t??n??m/ 1. N-UNCOUNT Plutonium is a radioactive element used especially in nuclear weapons and as a fuel in nuclear power stations. 钚 (一種放射性元素) 返回 plutonium劍橋詞典a chemical element that is a metal used in the production of nuclear power , and in nuclear weapons 钚 返回 plutonium