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[nuh-frid-ee-uh m] /nəˈfrɪd i əm/
noun, plural nephridia
[nuh-frid-ee-uh] /nəˈfrɪd i ə/ (Show IPA).
the excretory organ of many invertebrates, consisting of a tubule with one end opening into the body cavity and the other opening into a pore at the body surface.
Origin of nephridium
From New Latin, dating back to 1875-80; See origin at nephr-, -idium
Related forms
nephridial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for nephridium


noun (pl) -ia (-ɪə)
a simple excretory organ of many invertebrates, consisting of a tube through which waste products pass to the exterior
Derived Forms
nephridial, adjective
Word Origin
C19: New Latin: little 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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Word Origin and History for nephridium

(plural nephridia), 1877, Modern Latin, from Greek diminutive of nephros "kidney" (see nephron).

Online Etymology Dictionary, © 2010 Douglas Harper
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nephridium in Medicine

nephridium ne·phrid·i·um (nə-frĭd'ē-əm)
n. pl. ne·phrid·i·a (-ē-ə)
The embryonic excretory organ from which the kidney develops.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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