Medical Dictionary

pronephros

noun pro·neph·ros \(ˈ)prō-ˈnef-rəs, -ˌräs\
plural pro·neph·roi \-ˌri\

Definition of PRONEPHROS

:  either member of the first and most anterior pair of the three paired vertebrate renal organs that functions in the adults of amphioxus and some lampreys, functions temporarily in larval fishes and amphibians, and is present but nonfunctional in embryos of reptiles, birds, and mammals—compare mesonephros, metanephros
March 27, 2015
quiescent Hear it
Tranquilly at rest or causing no trouble
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