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…
| 单词 | θ34235 |
| 释义 | the world > animals > invertebrates > phylum Arthropoda > class Insecta > parts of insects > [noun] > thorax > metathorax > covering of spiracles on (1) operculum1816 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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