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  1. Oxford Dictionary

    sand dollar

    • n.
      a flattened sea urchin which lives partly buried in sand, feeding on detritus.

    • noun: sand dollar, plural noun: sand dollars

    • 更多解釋

    sand dollar

    • IPA[sand ˈdälər]
    • n.
      a flattened sea urchin which lives partly buried in sand, feeding on detritus.

    Oxford American Dictionary