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  1. Oxford American Dictionary

    vertical fin

    • IPA[ˈvərdəkəl fin]
    • n.
      any of the unpaired fins in the midline of a fish's body, i.e. a dorsal, anal, or caudal fin.

    • noun: vertical fin, plural noun: vertical fins

    • 更多解釋

    vertical fin

    • n.
      any of the unpaired fins in the midline of a fish's body, i.e. a dorsal, anal, or caudal fin.

    Oxford Dictionary