inferior vena cava

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy The large vein which returns blood from the lower extremities, and the pelvic and abdominal organs, to the right atrium of the heart.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun receives blood from lower limbs and abdominal organs and empties into the posterior part of the right atrium of the heart; formed from the union of the two iliac veins