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  1. Oxford American Dictionary

    prismatic layer

    • IPA[prizˈmadik ˈlāər]
    • n.
      the middle layer of the shell of a mollusk, consisting of calcite or aragonite.

    • noun: prismatic layer, plural noun: prismatic layers

    • 更多解釋

    prismatic layer

    • n.
      the middle layer of the shell of a mollusc, consisting of crystalline calcite or aragonite.

    Oxford Dictionary