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doc Definition of erbium
    English to English
    noun
  • a trivalent metallic element of the rare earth group; occurs with yttrium
  • source: WordNet 3.0
  • A rare metallic element associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden. Symbol Er. Atomic weight 165.9. Its salts are rose-colored and give characteristic spectra. Its sesquioxide is called erbia.
  • source: Webster 1913
  • A metallic element of the rare earth group, found in gadolinite and some other minerals. Symbol, Er; at. wt. 167.4. Its salts are rose-colored and give characteristic spectra.
  • source: Webster 1913
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