undecennial
adj.
"occurring every 11 years," 1858, in reference to solar activity cycle, from Latin undecim "eleven" + ending from biennial, etc.
| 词汇 | undecennial |
| 词根词缀 | Online Etymology Dictionary undecennial adj. "occurring every 11 years," 1858, in reference to solar activity cycle, from Latin undecim "eleven" + ending from biennial, etc. |
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