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neptunium    音标拼音: [nɛpt'uniəm]
n. 镎

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neptunium
n 1: a radioactive transuranic metallic element; found in trace
amounts in uranium ores; a by-product of the production of
plutonium [synonym: {neptunium}, {Np}, {atomic number 93}]

Neptunium \Nep*tu"ni*um\, n. [NL.]
A radioactive metallic element of atomic number 93, produced
in nuclear reactors from Plutonium or Uranium. Symbol Np; The
atomic weight of the most stable isotope is 237.0482.
[PJC]

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  • neptunium - Wiktionary, the free dictionary
    A sphere of neptunium Warning: Do not try this at home Neptunium is fissile; there is a risk of a criticality accident
  • Neptunian - Wiktionary, the free dictionary
    Neptunian (not comparable) A statue of Neptune and Triton (c 1622–1623) by Gian Lorenzo Bernini [n 1] One of the senses of the word Neptunian is “of or pertaining to Neptune, the Roman god of fresh water and the sea ” (etymology 1, adjective sense 1) (Roman mythology) Of or pertaining to Neptune, the Roman god of fresh water and the sea, the counterpart of the Greek god Poseidon
  • Wiktionary, the free dictionary
    Wiktionary has grown beyond a standard dictionary and now includes a thesaurus, a rhyme guide, phrase books, language statistics and extensive appendices We aim to include not only the definition of a word, but also enough information to really understand it Thus etymologies, pronunciations, sample quotations, synonyms, antonyms and translations are included
  • neptuni - Wiktionary, the free dictionary
    Ultimately from New Latin neptunium, with the suffix -um removed as with most chemical element s
  • neptunic - Wiktionary, the free dictionary
    English Adjective neptunic (not comparable) (inorganic chemistry) Relating to tetravalent neptunium
  • neptunio - Wiktionary, the free dictionary
    “ neptunio ”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23 8 1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025 neptunio on the Spanish Wikipedia Wikipedia es
  • Wiktionary, the free dictionary
    (linguistics) alternating with (computing) user 's home directory in Unix -like operating systems (lexicography) Replaces the headword in derivatives or example sentences, to save space
  • neptun - Wiktionary, the free dictionary
    (This etymology is missing or incomplete Please add to it, or discuss it at the Etymology scriptorium )
  • Appendix:Very large numbers - Wiktionary, the free dictionary
    The following table lists the names for extremely large numbers Many of these are used very rarely that they do not have entries in Wiktionary because they do not meet CFI
  • Np - Wiktionary, the free dictionary
    Symbol Np (chemistry) Chemical symbol for neptunium neper





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