[nuh-frid-ee-uh m]

noun, plural ne·phrid·i·a [nuh-frid-ee-uh] /nəˈfrɪd i ə/. Zoology.

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 formsne·phrid·i·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nephridium

Historical Examples of nephridium

British Dictionary definitions for nephridium


noun plural -ia (-ɪə)

a simple excretory organ of many invertebrates, consisting of a tube through which waste products pass to the exterior
Derived Formsnephridial, adjective

Word Origin for nephridium

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

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

nephridium in Medicine



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.