WordReference Random House Unabridged Dictionary of American English © 2026
ne•phrid•i•um
(nə frid′ē əm),USA pronunciation n., pl. -phrid•i•a (-frid′ē ə).USA pronunciation [Zool.]
ne•phrid′i•al, adj.
- Zoology, Invertebratesthe 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.
- Neo-Latin; see nephr-, -idium
- 1875–80