Cerium definition

Cerium





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3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Cerium \Ce"ri*um\, n. [Named by Berzelius in 1803 from the
     asteroid Ceres, then just discovered (1801).] (Chem.)
     A rare metallic element, occurring in the minerals cerite,
     allanite, monazite, etc. Symbol Ce. Atomic weight 141.5. It
     resembles iron in color and luster, but is soft, and both
     malleable and ductile. It tarnishes readily in the air.


     [1913 Webster]

From WordNet (r) 2.0 [wn]:

  cerium
       n : a ductile gray metallic element of the lanthanide series;
           used in lighter flints; the most abundant of the
           rare-earth group [syn: {Ce}, {atomic number 58}]

From Elements database 20001107 [elements]:

  cerium
  Symbol: Ce
  Atomic number: 58
  Atomic weight: 140.12
  Silvery metallic element, belongs to the lanthanoids. Four natural
  isotopes exist, and fifteen radioactive isotopes have been identified.
  Used in some rare-earth alloys. The oxidized form is used in the glass
  industry. Discovered by Martin .H. Klaproth in 1803.
  
  

















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