| 单词 | quindecennial |
| 释义 | quindecennial(ˌkwɪndɪˈsɛnɪəl) adjective 1. occurring once every 15 years or over a period of 15 years noun 2. a 15th anniversary Word origin C20: from Latin quindecim fifteen + annus year, on the model of biennial |
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