noun Etymology: Tamil kuruntam; akin to Sanskrit kuruvinda ruby Date: 1804 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

New Collegiate Dictionary. 2001.

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  • Corundum — General Category Oxide mineral – Hematite group Chemical formula Alumi …   Wikipedia

  • Corundum — Co*run dum (k[ o]*r[u^]n d[u^]m), n.; pl. {Corundums} (k[ o]*r[u^]n d[u^]mz). [Also corindon.] [From Hind. kurand corundum stone.] (Min.) The mineral alumina ({Al2O3}), as found native in a crystalline state. Transparent varieties are used as… …   The Collaborative International Dictionary of English

  • corundum — very hard mineral, 1728, from Anglo Indian, from Tamil kurundam ruby sapphire (Skt. kuruvinda), of unknown origin …   Etymology dictionary

  • corundum — ► NOUN ▪ extremely hard crystallized alumina, used as an abrasive. ORIGIN Tamil …   English terms dictionary

  • corundum — [kə run′dəm] n. [Tamil kurundam < Sans kuruvinda, ruby] a very hard mineral, aluminum oxide, Al2O3: a dark, coarse variety ( emery) is used for grinding and polishing; clear, transparent varieties ( ruby, sapphire) are used as gems: see MOHS… …   English World dictionary

  • corundum — /keuh run deuhm/, n. a common mineral, aluminum oxide, Al2O3, notable for its hardness: transparent varieties, as sapphire and ruby, are used as gems, other varieties as abrasives: often made synthetically. [1720 30; < Tamil kuruntam; akin to Skt …   Universalium

  • corundum — korundas statusas T sritis radioelektronika atitikmenys: angl. corundum vok. Korund, m rus. корунд, m pranc. corindon, m …   Radioelektronikos terminų žodynas

  • corundum — korundas statusas T sritis chemija apibrėžtis Mineralas. formulė Al₂O₃ atitikmenys: angl. corundum rus. корунд …   Chemijos terminų aiškinamasis žodynas

  • corundum — noun an extremely hard mineral, a form of aluminium oxide with the chemical formula AlO, that occurs in the form of the gemstones ruby and sapphire; it is used as an abrasive …   Wiktionary

  • corundum — Native crystalline aluminum oxide. [Hind. kurand] * * * co·run·dum kə rən dəm n a very hard mineral Al2O3 that consists of alumina occurring in massive form and as variously colored crystals which include the ruby and sapphire * * * co·run·dum… …   Medical dictionary

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