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Definition of Thoracic aorta
1. Noun. A branch of the descending aorta; divides into the iliac arteries.
Medical Definition of Thoracic aorta
1. The part of the descending aorta that supplies structures as far down as the diaphragm. Synonym: pars thoracica aortae, aorta thoracica, thoracic part of aorta. (05 Mar 2000)