corundum
noun /kəˈrʌndəm/
/kəˈrʌndəm/
[uncountable]- an extremely hard form of alumina found in rubies and sapphires. Corundum is used as an abrasive.Word Originearly 18th cent.: from Tamil kuruntam and Telugu kuruvindam.
| 单词 | corundum |
| 释义 | corundumnoun /kəˈrʌndəm/ /kəˈrʌndəm/ [uncountable]
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