单词 | prostomium |
释义 | prostomium —prostomial, adj. /proh stoh"mee euhm/, n. , pl. prostomia /-mee euh/. the unsegmented, preoral portion of the head of certain lower invertebrates. [1865-70; < NL < Gk prostómion mouth. See PRO-2, STOMA, -IUM] |
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