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Noun: alumina  u'loo-mi-nu
  1. Any of various forms of aluminium oxide occurring naturally as corundum
    "Alumina is used in the production of aluminium metal";
    - aluminum oxide [N. Amer], aluminium oxide [Brit]

Derived forms: aluminas

Type of: corundum

Part of: furnace lining, refractory

Encyclopedia: Alumina