corundum
Definition from Wiktionary, the free dictionary
Contents |
English [edit]
Etymology [edit]
From Tamil குருந்தம் (kuruntam, “ruby”).
Pronunciation [edit]
Noun [edit]
corundum (uncountable)
- (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.