Meaning of NEPTUNIUM in English

NEPTUNIUM

/ nepˈtjuːniəm; NAmE ; NAmE also -ˈtuːn-/ noun

[ U ] ( symb Np ) a chemical element. Neptunium is a radioactive metal.

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WORD ORIGIN

late 19th cent.: from Neptune , on the pattern of uranium (Neptune being the next planet beyond Uranus).

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.