Aorta

Etymology
From ἀορτή: from ἀορτέω:, lengthened form of ἀείρω:

Noun

 * 1)  The great artery which carries the blood from the heart to all parts of the body except the lungs; the main trunk of the arterial system.
 * 2)  The liveliest part of something.

Derived terms

 * aortal
 * aortic