alúmina

n. oxidized alum (Chemistry)

Aluminium oxide is an amphoteric oxide of aluminium with the chemical formula 2O3. It is also commonly referred to as alumina in the mining, ceramic and materials science communities.
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Noun
1. any of various forms of aluminum oxide occurring naturally as corundum
(synonym) aluminum oxide, aluminium oxide
(hypernym) corundom, corundum
(hyponym) alundum
(substance-holonym) furnace lining, refractory

v. aluminize, treat with aluminum

n. alumina, oxidized alum (Chemistry)

v. aluminate