from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The capillaries that supply blood to vessels larger than 1 mm. They supply blood to the adventitia and middle tunicae.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any small blood vessel ramifying on the outside of a major artery or vein
From the Latin vasa, plural of vas ("vessel") + vasorum, the plural genitive of vas ("vessel"). Meaning "vessels of the vessels." (Wiktionary)