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  1. Oxford Dictionary

    opercular

    • IPA[ə(ʊ)ˈpəːkjʊlə]

    英式

    • adj.
      relating to or denoting a structure that closes or covers an aperture such as a fish's gills
    • 釋義

    形容詞

    • 1. relating to or denoting a structure that closes or covers an aperture such as a fish's gills age and growth of individual fish were determined from opercular bones