corundum
/kəˈrʌndəm/noun
mass noun
- extremely hard crystallized alumina, used as an abrasive. Ruby and sapphire are varieties of corundum.刚玉。
词源
early 18th cent.: from Tamil kuruntam and Telugu kuruvindam.
| 单词 | corundum |
| 释义 | corundum/kəˈrʌndəm/noun mass noun
词源 early 18th cent.: from Tamil kuruntam and Telugu kuruvindam. |
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