corundum

Fetched 2026-10-26 (cache).

Synonyms: corundom, corrundum, conundrum, cundum, corneum, coronium, corundums, rotundum

Antonyms: corundom, corrundum, conundrum, cundum, corneum, coronium, corundums, rotundum

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|mineral}} An [[extremely]] [[hard]] [[mineral]], a form of [[aluminum oxide]] with the [[chemical formula]] [[aluminum|Al]]₂[[oxygen|O]]₃, that occurs in the form of the [[gemstone]]s [[sapphire]] and [[ruby]]; it is used as an [[abrasive]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.