- ctenidium
[ctenidium 词源字典]
- "A comb-like structure, especially a respiratory organ or gill in a mollusc, consisting of an axis with a row of projecting filaments", Late 19th century; modern Latin, from Greek ktenidion, diminutive of kteis, kten- 'comb'.[ctenidium etymology, ctenidium origin, 英语词源]