mesonephros
[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.
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Compare metanephros, pronephros.
Origin of mesonephros
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for mesonephros
Historical Examples
The Wolffian body, which may be also called the mesonephros.
The Works of Francis Maitland Balfour, Volume III (of 4)Francis Maitland Balfour
The mesonephros of the larva disappears, and a fresh posterior part is formed.
The Works of Francis Maitland Balfour, Volume III (of 4)Francis Maitland Balfour
Owing to the formation of the accessory tubuli the segments of the mesonephros acquire a compound character.
The Works of Francis Maitland Balfour, Volume III (of 4)Francis Maitland Balfour
The segmental tubes of the mesonephros undergo further important changes.
The Works of Francis Maitland Balfour, Volume III (of 4)Francis Maitland Balfour
While the lumen is gradually being formed, the segmental tubes of the mesonephros become established.
The Works of Francis Maitland Balfour, Volume III (of 4)Francis Maitland Balfour
mesonephros
- the middle part of the embryonic kidney in vertebrates, becoming the adult kidney in fishes and amphibians and the epididymis in reptiles, birds, and mammalsSee also pronephros, metanephros
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Word Origin
C19: New Latin, from meso- + Greek nephros kidney
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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mesonephros
(mĕz′ə-nĕf′rəs, -rŏs′)- The second of the three excretory organs that develop in a vertebrate embryo, replaced by the metanephros in higher vertebrates.wolffian body
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.