Dictionary![]() ![]() neph•ro•stomePronunciation: (nef'ru-stōm"), [key] —n. 1. Zool.the ciliated opening of a nephridium into the coelom. 2. Embryol.a similar opening from the coelom into a tubule of the embryonic kidney. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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