- one of the three embryonic excretory organs of higher vertebrates, becoming the permanent and functional kidney.
Origin of metanephros
1875–80; < New Latin < Greek meta- meta- + nephrós kidney
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for metanephros
The differentiation of a posterior section of the mesonephros into a special gland foreshadowing the metanephros of the Amniota.
The ureter which carries off the secretion of the kidney proper or metanephros.
The mode of development of the metanephros has as yet only been satisfactorily elucidated in the Chick (Sedgwick, No. 549).
C19: New Latin, from meta- + Greek nephros kidney
- 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.