polonium
/pəˈləʊnɪəm/noun
mass noun
- the chemical element of atomic number 84, a radioactive metal occurring in nature only as a product of radioactive decay of uranium (Symbol: Po).（化学元素）钋（符号：Po）。
词源
late 19th cent.: modern Latin, from medieval Latin Polonia 'Poland' （the native country of Marie Curie, the element's co-discoverer）.