noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A vasiform excretory gland observed in invertebrates, such as annelids, arthropods and molluscs.

Synonyms

All synonyms

protonephridium

Etymology

From meta- + nephridium.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.