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metanephros

[met-uh-nef-ros] /ˌmɛt əˈnɛf rɒs/
noun, plural metanephroi
[met-uh-nef-roi] /ˌmɛt əˈnɛf rɔɪ/ (Show IPA).
Embryology
1.
one of the three embryonic excretory organs of higher vertebrates, becoming the permanent and functional kidney.
Origin
1875-1880
1875-80; < Neo-Latin < Greek meta- meta- + nephrós kidney
Related forms
metanephric, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for meta nephric

metanephros

/ˌmɛtəˈnɛfrɒs/
noun (pl) -roi (-rɔɪ)
1.
the last-formed posterior part of the embryonic kidney in reptiles, birds, and mammals, which remains functional in the adult See also pronephros, mesonephros
Word Origin
C19: New Latin, from meta- + 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
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meta nephric in Medicine

metanephros met·a·neph·ros (mět'ə-něf'rəs, -rŏs')
n. pl. met·a·neph·roi (-roi')
The third and final excretory organ that develops in a vertebrate embryo. In birds, reptiles, and mammals it replaces the mesonephros as the functional excretory organ and develops into the adult kidney.


met'a·neph'ric (-rĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for meta nephric

metanephros

permanent kidney in reptiles, birds, and mammals, developing by the 10th week in human embryos from the lower part of the Wolffian duct, and replacing the embryonic structure called the mesonephros. It consists of a compact, paired organ containing many nephrons; a ureter separate from the Wolffian duct leads from the metanephros to the bladder.

Learn more about metanephros with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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6
7
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