| 单词 |
vigintennial |
| 释义 |
vigintennial, a. rare.|vaɪdʒɪnˈtɛnɪəl| [f. viginti-, after biennial a. and n., triennial, a. and n., etc.] Occurring once in twenty years.
1921Glasgow Herald 29 Jan. 13/3 Their [sc. the planets'] vigintennial conjunction is due a few months hence. |

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