Comb-like respiratory structure serving as the gill of certain mollusks

Wikipedia Word definitions in Wikipedia
A ctenidium is a respiratory organ or gill which is found in many mollusks. This structure exists in bivalves , cephalopods , and in many aquatic gastropods , i.e. in some freshwater snails and sea snails and also in some sea slugs . Some aquatic gastropods ...

Wiktionary Word definitions in Wiktionary
n. 1 (context zoology English) A respiratory system, in the form of a comb, in some molluscs 2 (context zoology English) A row of spines in some insects

WordNet Word definitions in WordNet
n. comb-like respiratory structure serving as the gill of certain mollusks [also: ctenidia (pl)]