Natural History. Any natural structure, acting as a lid; an operculum. rare.
| 单词 | θ31266 |
| 释义 | the world > animals > animal body > general parts > [noun] > lid or cover (2) coverclea1682 Natural History. Any natural structure, acting as a lid; an operculum. rare. opercular1841 Zoology. The hindmost and largest of the bones of the operculum of a fish. Formerly also: †the splenial bone in the lower jaw of reptiles and some… |
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