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[met-uh-nef-ros] /ˌmɛt əˈnɛf rɒs/
noun, plural metanephroi
[met-uh-nef-roi] /ˌmɛt əˈnɛf rɔɪ/ (Show IPA).
one of the three embryonic excretory organs of higher vertebrates, becoming the permanent and functional kidney.
Origin of metanephros
1875-80; < New Latin < Greek meta- meta- + nephrós kidney
Related forms
metanephric, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for metanephric


noun (pl) -roi (-rɔɪ)
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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metanephric 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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