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  • Webster's Revised Unabridged Dictionary
    • n Nephrostome (Zoöl. & Anat) The funnel-shaped opening of a nephridium into the body cavity.
    • ***
Century Dictionary and Cyclopedia
    • n nephrostome One of the ciliated infundibular orifices of a primitive kidney. See pronephron.
    • n nephrostome Same as nephrostoma.
    • ***


Webster's Revised Unabridged Dictionary
Gr. nefro`s a kidney + sto`ma mouth


In literature:

Their external openings are ventral, and on the same level as the ciliated funnel-shaped nephrostomes.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10" by Various