from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The principal ore of aluminum, composed mainly of hydrous aluminum oxides and aluminum hydroxides.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The principal ore of aluminium; a clay-like mineral, being a mixture of hydrated oxides and hydroxides.
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. A clay found at Les Baux, near Aries in France, and elsewhere, in concretionary grains or oölitic
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a clay-like mineral; the chief ore of aluminum; composed of aluminum oxides and aluminum hydroxides; used as an abrasive and catalyst
After Les Baux, a commune of southeast France.(American Heritage® Dictionary of the English Language, Fourth Edition)
French from Les Baux in France. (Wiktionary)