Portal

pōrt′al, n. a small gate: any entrance: ( arch it. ) the arch over a gate: the le er of two gates.— Portal circulation , the capillary transmi ion of venous blood from one organ to another in its pa age to the heart; Portal system , the portal vein with its tributaries, .; Portal vein , the vein which conveys to the liver the venous blood from intestines, spleen, and stomach. [O. Fr. (Fr. portail )—Low L. portale —L. porta , a gate.]