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  1. Oxford American Dictionary

    portal system

    • IPA[ˈpôrdl ˈsistim]
    • n.
      the system of blood vessels consisting of the portal vein with its tributaries and branches.；any system of blood vessels which has a capillary network at each end.

    • noun: portal system, plural noun: portal systems

    • 更多解釋

    portal system

    • n.
      the system of blood vessels consisting of the hepatic portal vein with its tributaries and branches.

    Oxford Dictionary