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Definisjon av corundum

Vi fant 3 definisjoner av corundum på engelsk.

Annonsering

WordNet WordNet by Princeton University

Noun
corundum - very hard mineral used as an abrasive
corundom
mineral solid homogeneous inorganic substances occurring in nature having a definite chemical composition
emery a hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper)
alumina, aluminium oxide, aluminum oxide any of various forms of aluminum oxide occurring naturally as corundum
ruby a transparent piece of ruby that has been cut and polished and is valued as a precious gem
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Wiktionary Wiktionary dictionary logo

Substantiv
corundum - An extremely hard mineral, a form of aluminum oxide with the chemical formula Al2O3, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.

Wikipedia Wiktionary dictionary logo

  • Corundum is a crystalline form of aluminium oxide (Al2O3) with traces of iron, titanium and chromium. It is a rock-forming mineral. It is one of the naturally clear transparent materials, but can have different colors when impurities are present.

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