noun, plural cte·nid·i·a [ti-nid-ee-uh] /tɪˈnɪd i ə/. Zoology.
Examples from the Web for ctenidia
Probably a straining of water from solid particles is effected by the lattice-work of the ctenidia or gill-plates.
No ctenidia but pallial branchiae in a circle between mantle and foot.
Ctenidia, plural of Ctenidium: Gills, or breathing-organs, adapted to water-respiration.The Sea-beach at Ebb-tide|Augusta Foote Arnold
Two pairs of ctenidia, and two pairs of renal tubes without reno-pericardial apertures.
A single pair of ctenidia (gill-plumes) is present instead of the two pairs in Nautilus.