| 单词 | pygidium |
| 释义 | Word Frequency pygidium(paɪˈdʒɪdɪəm, -ˈɡɪd-) nounWord forms: plural -ia (-ɪə) the terminal segment, division, or other structure in certain annelids, arthropods, and other invertebrates Derived forms pygidial (pyˈgidial) adjective Word origin C19: from New Latin, from Greek pugē rump |
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