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Pronunciation: met'a-nef'ros, -roy

Definition: The most caudally located of the three excretory organs appearing in the evolution of the vertebrates (the others being the pronephros and the mesonephros); in mammalian embryos, the metanephros develops caudal to the mesonephros during its regression, becoming the permanent kidney.

Synonym(s): hind kidney

[meta- + G. nephros, kidney]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.