ne·phrid·i·um /nɪˈfrɪdiəm/
  腎,腎管
  ne·phrid·i·um /nɪˈfrɪdɪəm/ 名詞
  (複nephridia)腎管,原腎
  Ne·phrid·i·um n.; pl. Nephridia   Zool. & Anat. A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.
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