corundum

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English[edit]

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Corundum

Etymology[edit]

From Tamil குருந்தம் (kuruntam, ruby).

Pronunciation[edit]

Noun[edit]

corundum (uncountable)

  1. (mineralogy) 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.

Translations[edit]