alumina
/əˈljuːmɪnə/noun
mass noun
1- a white solid that is a major constituent of many rocks, especially clays, and is found crystallized as corundum, sapphire, and other minerals矾土。
1.1
- Alternative name: aluminium oxide; chem. formula: Al2O3.又名： 氧化铝; 化学分子式： Al2O3.
词源
late 18th cent.: from Latin alumen （see ALUM）， on the pattern of words such as magnesia.