corundum
1 synonym for corundum, grouped by meaning and by how common each one is.
Noun — A very hard mineral made of aluminium oxide, found naturally as sapphire and ruby and used for grinding and polishing.
Synonyms
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
corundom
Etymology
It comes from Tamil குருந்தம் (kuruntam, "ruby, sapphire") and was first attested in the early 18th century.
Full origin of corundum →