| 单词 | sipunculid |
| 释义 | sipunculid (once / 11819311 pages) n WORD FAMILY sipunculid n small unsegmented marine worm that when disturbed retracts its anterior portion into the body giving the appearance of a peanut Syn|Hyper peanut worm invertebrate any animal lacking a backbone or notochord; the term is not used as a scientific classification |
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