Find the word definition

The Collaborative International Dictionary
Nephridia

Nephridium \Ne*phrid"i*um\, n.; pl. Nephridia. [NL., fr. Gr. ? of the kidneys.] (Zo["o]l. & Anat.) A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.

Wiktionary
nephridia

n. (plural of nephridium English)

WordNet
nephridia