Pronunciation: (hep"u-tō-pôr'tl, -pōr'-, hi-pat"u-), [key] Anat.
a vascular arrangement in vertebrates through which blood is transported into the liver from capillaries of the stomach, spleen, duodenum, pancreas, and intestines. Cf. portal system.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.