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(co-run-dum) 3 syllables

Definition

noun. a hard mineral used as an abrasive.

Example Sentence

Corundum is used as an abrasive and also as a gemstone.

More Example Sentences

Jewels like sapphires are corundum crystals.

Synonyms

alumina; abrasive; sapphire

Antonyms

hydrogen

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corundum
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Rhymes

  • corundum

  • carborundum
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