1. In Polychaeta, the opening of the nephridium into the coelom.
2. (nephrocoelostome) In the excretory system of vertebrate embryos and in the vertebrate kidney, the opening of an excretory tubule into the cavity of the Bowman's capsule.
"nephrostome." A Dictionary of Zoology. . Encyclopedia.com. (September 19, 2018). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/nephrostome
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