The term 'aortic' is a 6-letter word that refers to a large artery. The aorta is the largest artery in the human body and is responsible for carrying oxygen-rich blood from the heart to the rest of the body. It is divided into four sections, the ascending aorta, the arch of the aorta, the descending aorta, and the abdominal aorta. The aorta is an important part of the cardiovascular system and any issues with it can lead to serious health problems.