neptunium
noun /nepˈtjuːniəm/
/nepˈtuːniəm/
[uncountable] (symbol Np)
- a chemical element. Neptunium is a radioactive metal.Word Originlate 19th cent.: from Neptune, on the pattern of uranium (Neptune being the next planet beyond Uranus).
单词 | neptunium |
释义 | neptuniumnoun /nepˈtjuːniəm/ /nepˈtuːniəm/ [uncountable] (symbol Np)
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