Pronephros
noun, plural pronephroi
[proh-nef-roi] /proʊˈnɛf rɔɪ/ (Show IPA), pronephra
[proh-nef-ruh] /proʊˈnɛf rə/ (Show IPA). Embryology.
1.
one of the three embryonic excretory organs of vertebrates, which becomes the functional kidney of certain primitive fishes.
noun (pl) -roi (-rɔɪ), -ra (-rə)
1.
the first-formed anterior part of the embryonic kidney in vertebrates, which remains functional in the larvae of the lower vertebrates See also mesonephros, metanephros
pronephros pro·neph·ros (prō-něf’rəs, -rŏs’)
n. pl. pro·neph·roi (-roi) or pro·neph·ra (-rə)
A kidneylike organ, being either part of the most anterior pair of three pairs of organs in a vertebrate embryo, usually disappearing early in embryonic development.
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