nephridium

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noun

A tubular excretory organ in some invertebrates.

OriginEnglish nephro- ← Ancient Greek νεφρός (nephrós) ← Proto-Hellenic *nekʷʰrós →
Scrabble 18
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Meanings

nounnephridium (plural nephridiums or nephridia)

plural nephridiums · plural nephridia

  1. biologyA tubular excretory organ in some invertebrates.
  2. anatomyThe embryonic excretory organ that develops into the kidney.

Origin

  1. Proto-Indo-European*negʷʰrós
  2. Proto-Hellenic*nekʷʰrós
  3. Ancient Greekνεφρός (nephrós)
  4. Englishnephro-
  5. Englishnephridium

From nephro- + -idium.

Full word history & related roots →

Translations

Greek νεφρίδιο
  • νεφρίδιο (nefrídio)biology: a tubular excretory organ in some invertebrates
Italian nefridio
  • nefridiobiology: a tubular excretory organ in some invertebrates
Spanish nefridio
  • nefridiobiology: a tubular excretory organ in some invertebrates
Cite this entry
APA

nephridium. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/nephridium

MLA

“nephridium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/nephridium. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “nephridium,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/nephridium.

Source: nephridium on Wiktionary, CC BY-SA 4.0.