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portal por·tal (pôr'tl)
Of or relating to a porta or hilum.
Of or relating to the portal vein or the portal system.
Of or relating to a point of entrance to an organ, especially the transverse fissure of the liver, through which the blood vessels enter.
The portal vein.
The point of entry into the body of a pathogenic microorganism.
A Web site that provides a gateway to other Web sites.