noun (pl=aortas or aortae)
- (anatomy) 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.
- (figurative) The liveliest part of something.
- Tracing their battles, I had many occasions to walk along Second Avenue, the of the Lower East Side, exploring places that were once as vibrant and tumultuous as Midtown Manhattan. http://travel.nytimes.com/2007/01/26/travel/escapes/26yiddish.html?8dpc
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Full Definition of aorta