Wiktionary
ctenidia
n. (plural of ctenidium English)
WordNet
ctenidia
See ctenidium
ctenidium
n. comb-like respiratory structure serving as the gill of certain mollusks
[also: ctenidia (pl)]
Wikipedia
Ctenidia (genus)
Ctenidia mordelloides is a species of beetle in the family Mordellidae, the only species in the genus Ctenidia.