alumina (redirected from hydrated alumina)

a·lu·mi·na  (-lm-n)

n.

Any of several forms of aluminum oxide, Al₂O₃, occurring naturally as corundum, in a hydrated form in bauxite, and with various impurities as ruby, sapphire, and emery, used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation. Also called aluminum oxide.

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[New Latin almina, from Latin almen, almin-, alum.]

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alumina  (-lm-n)

Any of several forms of aluminum oxide used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation. Alumina occurs naturally as the mineral corundum and, with minor traces of chromium and cobalt, as the minerals ruby and sapphire, respectively. In its hydrated form it also occurs as the rock bauxite. Also called aluminum oxide. Chemical formula: Al₂O₃.

Thesaurus

Noun

1.

alumina - any of various forms of aluminum oxide occurring naturally as corundum aluminium oxide, aluminum oxide furnace lining, refractory - lining consisting of material with a high melting point; used to line the inside walls of a furnace corundom, corundum - very hard mineral used as an abrasive alundum - a substance made of fused alumina