Associations to the word «Corundum»
Noun
Adjective
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Wiktionary
CORUNDUM, noun. (mineral) 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.
Dictionary definition
CORUNDUM, noun. Very hard mineral used as an abrasive.
Wise words
However many holy words you read, however many you speak,
what good will they do you if you do not act upon them?