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alu·mi·na ə-'lü-mə-nə n an oxide of aluminum Al2O3 that occurs native as corundum and in hydrated forms (as in bauxite) and is used in antacids called also aluminum oxide
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alu·mi·na (ə-looґmĭ-nə) 1. aluminum oxide. 2. (in pharmaceuticals) aluminum hydroxide.Medical dictionary. 2011.