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  1. placoderm

    • IPA[ˈplakədərm]

    美式

    • n.
      an extinct fish of the Devonian period, having the front part of the body encased in broad flat bony plates.
    • noun: placoderm, plural noun: placoderms

    • 更多解釋
    • IPA[ˈplakə(ʊ)dəːm]

    英式

    • n.
      a fossil fish of the Devonian period, having the front part of the body encased in broad flat ...

    Oxford Dictionary