| 单词 | operculum |
| 释义 | Word Frequency operculum(əʊˈpɜːkjʊləm) or opercule (əʊˈpɜːkjuːl) nounWord forms: plural -la (-lə) or -lums 1. zoology a. the hard bony flap covering the gill slits in fishes b. the bony plate in certain gastropods covering the opening of the shell when the body is withdrawn 2. botany the covering of the spore-bearing capsule of a moss 3. biology any other covering or lid in various organisms Derived forms opercular (oˈpercular) or operculate (əʊˈpɜːkjʊlɪt, -ˌleɪt) or operculated (əʊˈpɜːkjʊˌleɪtɪd) adjective Word origin C18: via New Latin from Latin: lid, from operīre to cover |
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