Zoology. Any of various other structures covering or closing an aperture; spec. (a) a small bone in the middle ear of amphibians or (formerly) in…
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| 单词 | θ32565 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Polyzoa > [noun] > class Ectoprocta > order Gymnolaemata > suborder Chilostomata > member of > movable lid of cell (1) operculum1840 Zoology. Any of various other structures covering or closing an aperture; spec. (a) a small bone in the middle ear of amphibians or (formerly) in… |
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