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Noun: terbium  tur-bee-um
  1. A metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
    - Tb, atomic number 65

Derived forms: terbiums

Type of: metal, metallic element

Part of: apatite, gadolinite, monazite, ytterbite

Encyclopedia: Terbium