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corundum

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noun co·run·dum \kə-ˈrən-dəm\

Definition of corundum

  1. :  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 (as ruby and sapphire) and as an abrasive



Origin of corundum

Tamil kuruntam; akin to Sanskrit kuruvinda ruby


First Known Use: 1804


Medical Dictionary

corundum

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noun co·run·dum \kə-ˈrən-dəm\

Medical Definition of corundum

  1. :  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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