aorta

n. main artery of the body

The aorta (generally pronounced [eɪˈɔːtə] or "ay-orta") is the largest artery in the human body, originating from the left ventricle of the heart and bringing oxygenated blood to all parts of the body in the systemic circulation.
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Aorta /aor·ta/ pl. aor´tae, aortas [L.] the great artery arising from the left ventricle, being the main trunk from which the systemic arterial [more]Aorta - Community and Resources

Noun
1. the large trunk artery that carries blood from the left ventricle of the heart to branch arteries
(hypernym) artery, arteria, arterial blood vessel
(hyponym) ascending aorta

n. aorta, main artery of the body