(plural nephridia), "sexual or renal organ of mollusks," 1848, Modern Latin, from Greek diminutive of nephros "kidney" (see nephro-).
Entries linking to nephridium
nephro-
before vowels nephr-, word-forming element meaning "kidney, kidneys," from Greek nephros "a kidney" (plural nephroi), from PIE *negwhro- "kidney" (source also of Latin nefrones, Old Norse nyra, Dutch nier, German Niere "kidney").