the excretory organ serving as the adult kidney of fishes and amphibians and as the embryonic kidney of higher vertebrates: the mesonephros and its duct develop into the epididymis and vas deferens in higher vertebrates
Origin of mesonephrosModern Latin from meso-, meso- + Classical Greek nephros, kidney: see nephro-
The second of the three excretory organs that develop in a vertebrate embryo, becoming the functioning kidney in fish and amphibians but replaced by the metanephros in birds, reptiles, and mammals. Also called Wolffian body .
Origin of mesonephrosmeso- Greek nephros kidney