noun, plural pro·neph·roi [proh-nef-roi] /proʊˈnɛf rɔɪ/, pro·neph·ra [proh-nef-ruh] /proʊˈnɛf rə/. Embryology.
Origin of pronephros
Examples from the Web for pronephros
The pronephros is distinguished from the mesonephros by developmental as well as structural features.
For a long time the pronephros and its duct form the only excretory organs of larval Amphibia.
The knob forms the only structure which can be regarded as a rudiment of the pronephros.
The pronephros has only been observed in Birds, and is very possibly not developed in other Amniota.
The development of the mesonephros does not take place till long after that of the pronephros.