Webster's English Dictionary

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bauxite

baux.ite \'bo.k-.si-t, 'ba:k-\ \bo.k-'sit-ik, ba:k-\ n [F bauxite, fr. Les 
   Gaux, near Arles, France] : an impure mixture of earthy hydrous aluminum 
   oxides and hydroxides that  commonly contains similar compounds of iron and 
   occas. of manganese, usu. has a concretionary or oolitic structure, and is 
   the principal source of aluminum - baux.it.ic aj