baux·ite /ˈbɔkˌsaɪt, ˈbɑk-/
Baux·ite, Beaux·ite n. Min. A ferruginous hydrate of alumina. It is the most commonly used ore for the preparation of aluminum and alumina. It is also used for the lining of furnaces which are exposed to intense heat.
n : a clay-like mineral; the chief ore of aluminum; composed of
aluminum oxides and aluminum hydroxides; used as an
abrasive and catalyst