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doc Definition of fergusonite
    English to English
    noun
  • a dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals
  • source: WordNet 3.0
  • A mineral of a brownish black color, essentially a tantalo- niobate of yttrium, erbium, and cerium; -- so called after Robert Ferguson.
  • source: Webster 1913
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