corundum
0 antonyms and opposites of corundum, grouped by meaning.
Noun — 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.
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Etymology
From Tamil குருந்தம் (kuruntam, “ruby, sapphire”) First attested in the early 18th century.
Full origin of corundum →