Definition of protonephridial in English:

protonephridial

adjective

Zoology
  • Of or relating to a protonephridium; that is a protonephridium.

Origin

Late 19th century. From proto- + nephridial, after protonephridium.

Pronunciation

protonephridial

/ˌprəʊtə(ʊ)nɪˈfrɪdɪəl/