| 释义 |
plutonium/plu:ˈtəʊniəm/n. Chem. a dense silvery radioactive metallic transuranic element of the actinide series, used in some nuclear reactors and weapons (symbol 符 Pu) 【化】(化学元素)钚 [PLUTO, on the pattern of NEPTUNIUM, being the next planet beyond Neptune] |