operculumn.
英 ə(ʊ)'pɜːkjʊləm | 美 o'pɝkjʊləm
中文n. [昆] 盖；鳃盖
词根词源
operculum (n.)1713, from Latin operculum "cover, lid," from operire "to cover, close" (see weir), with instrumental suffix *-tlom. Related: Opercular.
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