单词 | pygidium |
释义 | pygidium —pygidial, adj. /puy jid"ee euhm/, n. , pl. pygidia /-jid"ee euh/. Zool. any of various structures or regions at the caudal end of the body in certain invertebrates. [1840-50; < NL < Gk pyg(é) rump + -idion dim. suffix] |
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