noun, plural cte·nid·i·a [ti-nid-ee-uh] /tɪˈnɪd i ə/. Zoology.
Examples from the Web for ctenidium
There is a ctenidium, except in some Thecosomata and Gymnosomata, and an osphradium.
No ctenidium, but a pulmonary cavity; operculum with an apophysis.
Cephalic shield continuous with dorsal integument; no shell; ctenidium projecting from mantle cavity.
Without shell and operculum, but with pallial cavity and ctenidium.
To the left of the ctenidium a pulmonary sac, separated from it by an incomplete septum, amphibious.