bauxite

n. earthy compound containing alumina

Bauxite is an aluminium ore. It consists largely of the minerals gibbsite Al(OH)3, boehmite and diaspore AlOOH, together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2. It was named after the village Les Baux-de-Provence in southern France, where it was first discovered in 1821 by geologist Pierre Berthier.
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Noun
1. a clay-like mineral; the chief ore of aluminum; composed of aluminum oxides and aluminum hydroxides; used as an abrasive and catalyst
(hypernym) mineral
(substance-meronym) aluminum, aluminium, Al, atomic number 13

n. bauxite, earthy compound containing alumina

n. bauxite, earthy compound containing alumina