Толковый словарь английского языка Oxford English Reference - portal

1. n. a doorway or gate etc., esp. a large and elaborate one. Etymology: ME f. OF f. med.L portale (neut. adj.): see PORTAL(2) 2. adj. 1 of or relating to an aperture in an organ through which its associated vessels pass. 2 of or relating to the portal vein. Phrases and idioms portal vein a vein conveying blood to the liver from the spleen, stomach, pancreas, and intestines. Etymology: mod.L portalis f. L porta gate