(inorganic chemistry) Al2O3 A compound in the form of a white powder or colorless hexagonal crystals; melts at 2020°C; insoluble in water; used in aluminum production, paper, spark plugs, absorbing gases, light bulbs, artificial gems, and manufacture of abrasives, refractories, ceramics, and electrical insulators.
aluminum oxide
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(ə′lüm·ə·nəm ′äk′sīd)
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