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: N- N. Na Nb Nc Nd Ne Ng Nh Ni Nj Nl Nm Nn No Np Nr Ns Nt Nu Nv Nw Ny
nepotist | neptune | neptunian | neptunicentric | neptunist | neptunium | ner | nerd | nere | nereid | nereidian

neptunium

 : 
Noun
 : 
nep=tu=ni=um

CIDE DICTIONARY

neptuniumn. [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]

OXFORD DICTIONARY

neptunium, n. Chem. a radioactive transuranic metallic element produced when uranium atoms absorb bombarding neutrons.

Usage
Symb.: Np.
Etymology
NEPTUNE, as the next planet beyond Uranus, + -IUM

For further exploring for "neptunium" in Webster Dictionary Online


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