the excretory organ lying behind the mesonephros in an embryo, which in mammals, reptiles, and birds develops into the permanent, or adult, kidney
Origin of metanephrosModern Latin from meta- + Classical Greek nephros, kidney: see nephro-
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.
Origin of metanephrosmeta- Greek nephros kidney
(plural metanephroi or metanephroses)
Ancient Greek behind + kidney.