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portal vein

noun, Anatomy
1.
the large vein conveying blood to the liver from the veins of the stomach, intestine, spleen, and pancreas.
Origin
1835-1845
1835-45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for portal-vein

portal vein

noun
1.
any vein connecting two capillary networks, esp in the liver (hepatic portal vein)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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portal-vein in Medicine

portal vein n.
A wide short vein that is formed by the superior mesenteric and splenic veins behind the pancreas, ascends in front of the inferior vena cava, and divides into right and left branches that ramify within the liver. Also called hepatic portal vein.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for portal-vein

portal vein

large vein through which oxygen-depleted blood from the stomach, the intestines, the spleen, the gallbladder, and the pancreas flows to the liver. The principal tributaries to the portal vein are the lienal vein, with blood from the stomach, the greater omentum (a curtain of membrane and fat that hangs down over the intestines), the pancreas, the large intestine, and the spleen; the superior mesenteric vein, with blood from the small intestine and part of the large intestine; the pyloric veins, with blood from the stomach; and the cystic veins, with blood from the gallbladder. In the liver the blood from the portal vein flows through a network of microscopic vessels called sinusoids in which the blood is relieved of worn-out red cells, bacteria, and other debris and in which nutrients are added to the blood or removed from it for storage. The blood leaves the liver by way of the hepatic veins.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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