Definition of ctenidium in English:

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Pronunciation: /təˈnidēəm/

noun (plural ctenidia /-ˈnidēə/)

A comblike structure, especially a respiratory organ or gill in a mollusk, consisting of an axis with a row of projecting filaments.
Example sentences
  • Meanwhile, Pelseneer had come up with a classification of bivalves based on the structure of the ctenidia.
  • Chaetoderms lack pedal grooves, have ctenidia paired in a small posterior mantle cavity, have a cuticular shield around the mouth and the stomach and digestive glands are separate.
  • Polyplacophorans have six to 88 pairs of bipectinate ctenidia, the number of which is typically not species specific, increasing as the individual grows.


Late 19th century; modern Latin, from Greek ktenidion, diminutive of kteis, kten- 'comb'.

For editors and proofreaders

Syllabification: cte·nid·i·um

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