Word Origin
a vascular arrangement in which blood from the capillaries of one organ is transported to the capillaries of another organ by a connecting vein or veins. (loosely) the hepatoportal system. Show More
Origin of portal system First recorded in 1850–55
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
portal system in Medicine A system of vessels in which blood, after passing through one capillary bed, is conveyed through a second capillary network. Show More
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
