| 单词 | vicennial |
| 释义 | vicennial /vuy sen"ee euhl/, adj. 1. of or for 20 years. 2. occurring every 20 years. [1730-40; < L vicenni(um) twenty-year period (vic(eni) twenty each + -enn(us), comb. form of annus year + -ium -IUM) + -AL1] |
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