[met-uh-nef-ros] /ˌmɛt əˈnɛf rɒs/

noun, plural metanephroi
[met-uh-nef-roi] /ˌmɛt əˈnɛf rɔɪ/ (Show IPA). Embryology.
one of the three embryonic excretory organs of higher vertebrates, becoming the permanent and functional kidney.
noun (pl) -roi (-rɔɪ)
the last-formed posterior part of the embryonic kidney in reptiles, birds, and mammals, which remains functional in the adult See also pronephros, mesonephros

metanephros met·a·neph·ros (mět’ə-něf’rəs, -rŏs’)
n. pl. met·a·neph·roi (-roi’)
The third and final excretory organ that develops in a vertebrate embryo. In birds, reptiles, and mammals it replaces the mesonephros as the functional excretory organ and develops into the adult kidney.
met’a·neph’ric (-rĭk) adj.


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