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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Examples: glitazone, GI cocktail, etc.