[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 mesonephric
The mesonephric ducts (w.d), the other product of the segmental ducts of the kidneys.
The mesonephric duct receives the secretion of the anterior tubuli of the primitive mesonephros.
The mesonephric tubules, called also the Wolffian body, open into this duct.
From this original nephrocœle are formed the pronephric excretory organs, the mesonephric excretory organs, and the body-cavity.
They differ also from the mesonephric tubules by not being so clearly segmental with the myotomes.
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.