pronephros


pro·neph·ros

noun \(ˌ)prō-ˈne-frəs, -ˌfräs\

Definition of PRONEPHROS

:  either member of the first and most anterior pair of the three successive 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
pro·neph·ric \-frik\ adjective

Origin of PRONEPHROS

New Latin, from Greek pro- + nephros kidney — more at nephritis
First Known Use: 1881

pro·neph·ros

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

Medical 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

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