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1. (n.) corundum
a mineral, aluminum oxide, Al
Etymology: (1720–30; < Tamil kuruntam; akin to Skt kuruvinda ruby)
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| Definition of 'Corundum' |
Princeton's WordNet |
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1. (noun) corundom, corundum
very hard mineral used as an abrasive
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| Definition of 'Corundum' |
Webster Dictionary |
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1. (noun) Corundum
the earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond
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