Source : Webster's Revised Unabridged Dictionary (1913)

Bauxite \Baux"ite\, Beauxite \Beaux"ite\,n. [F., fr. Baux or
   Beaux, near Arles.] (Min.)
   A ferruginous hydrate of alumina. It is largely used in the
   preparation of aluminium and alumina, and for the lining of
   furnaces which are exposed to intense heat.

Source : WordNet®

bauxite
     n : a clay-like mineral; the chief ore of aluminum; composed of
         aluminum oxides and aluminum hydroxides; used as an
         abrasive and catalyst