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Noun: hafnium  haf-nee-um
  1. A grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
    "Hafnium is used in nuclear submarine reactors as a neutron absorber";
    - Hf, atomic number 72

Derived forms: hafniums

Type of: metal, metallic element

Encyclopedia: Hafnium