[mez-uh-nef-ros, mes-, mee-zuh-, -suh-]
- one of the three embryonic excretory organs of vertebrates, becoming the functional kidney of fishes and amphibians and becoming part of the tubules or ductules in the reproductive systems of higher vertebrates.
Origin of mesonephros
1875–80; < New Latin, equivalent to meso- meso- + Greek nephrós kidney
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for mesonephros
The Wolffian body, which may be also called the mesonephros.
The mesonephros of the larva disappears, and a fresh posterior part is formed.
While the lumen is gradually being formed, the segmental tubes of the mesonephros become established.
The segmental tubes of the mesonephros undergo further important changes.
Owing to the formation of the accessory tubuli the segments of the mesonephros acquire a compound character.
C19: New Latin, from meso- + Greek nephros kidney
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- The second of the three excretory organs that develop in a vertebrate embryo, replaced by the metanephros in higher vertebrates.wolffian body
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.