| 单词 | neptunium |
| 释义 | Neptune /nepˈtūn/noun
ORIGIN: L Neptūnus Neptūˈnian adjective
Nepˈtūnist noun A believer in the origin of rocks generally as chemical precipitates from the sea, opp to Plutonist or Vulcanist neptūˈnium noun An artificially produced radioactive transuranic metallic element (symbol Np; atomic no 93) named as next after uranium, as Neptune is next after Uranus neptunium series noun A series formed by the decay of artificial radio-elements, the first member being plutonium-241 and the last bismuth-209, neptunium-237 being the longest-lived |
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