D defs.my
Entry 1 sense Webster, 1913

Nephridium

/nəf-rĭd'-ē-əm/ · Ne·phrid·i·um · IPA /nəfrˈɪdiːəm/
01 n. A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.
pl. Nephridia ((#))
  1. 1.
    A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.(Zool. & Anat.) See: Loeven's larva