vena cava

English Thesaurus

1. either of two large veins that return oxygen-depleted blood to the right atrium of the heart (noun.body)

hypernym	:	vein, vena, venous blood vessel,
definition	:	a blood vessel that carries blood from the capillaries toward the heart (noun.body)

hyponym	:	inferior vena cava, postcava,
definition	:	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 (noun.body)

hyponym	:	precava, superior vena cava,
definition	:	receives blood from the head and arms and chest and empties into the right atrium of the heart; formed from the azygos and both brachiocephalic veins (noun.body)