corundum

noun co·run·dum \ kə-ˈrən-dəm \

Definition of corundum

: a very hard mineral that consists of aluminum oxide occurring in massive and crystalline forms, that can be synthesized, and that is used for gemstones (such as ruby and sapphire) and as an abrasive

Recent Examples of corundum from the Web

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Origin and Etymology of corundum

Tamil kuruntam; akin to Sanskrit kuruvinda ruby


Medical Dictionary

corundum

noun co·run·dum \ kə-ˈrən-dəm \

medical Definition of corundum

: a very hard mineral Al2O3 that consists of alumina occurring in massive form and as variously colored crystals which include the ruby and sapphire

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