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doc Definition of europium
    English to English
    noun
  • a bivalent and trivalent metallic element of the rare earth group
  • source: WordNet 3.0
  • A metallic element of the rare-earth group, discovered spectroscopically by Demarcay in 1896. Symbol, Eu; at. wt., 152.0.
  • source: Webster 1913
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