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1. Oxford Dictionary

   nephridium

   • IPA[nɪˈfrɪdɪəm]

   英式

   • n.
     (in many invertebrate animals) a tubule open to the exterior which acts as an organ of excretion or osmoregulation. It typically has ciliated or flagellated cells and absorptive walls.

   • noun: nephridium, plural noun: nephridia

2. • 更多解釋

   nephridium

   • IPA[nəˈfridēəm]

   美式

   • n.
     (in many invertebrate animals) a tubule open to the exterior which acts as an organ of ...

   Oxford American Dictionary