corundum

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/kəˈɹʌn.dəm/ English

Definitions

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.

Related words

Synonyms

corundom emery curundum ruby aluminium oxide aluminum oxide alumina garnet carborundum sapphire alundum rock ruby saphire almandine kurumsakite arsenocrandallite

Associated

alexandrite spinel rutile hematite rubies alo vanadium chromium magnetite bauxite hardness

Rhymes

anyone dumb bund im carborundum dunned him fund him gunned him refund him rund um shunned him stunned him

References