| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024o•per•cu•lum (ō pûr′kyə ləm),USA pronunciation n., pl. -la (-lə),USA pronunciation -lums. - Botany, Zoologya part or organ serving as a lid or cover, as a covering flap on a seed vessel.
- Zoology
- the gill cover of fishes and amphibians. See diag. under fish.
- (in many gastropods) a horny plate that closes the opening of the shell when the animal is retracted.
- Neo-Latin, Latin: lid, cover, equivalent. to oper(īre) to cover + -culum -cule2
- 1705–15
|