- Around the aorta. The aorta is the great artery that comes from the left ventricle of the heart and delivers oxygen-rich blood to the body. Peri- is a prefix borrowed from the Greek. It means "around or about." So perianal is around the anus. For example; pericardial is around the heart, perinatal is around birth, and periumbilical is around the umbilicus (the belly button). Peri- is a useful prefix in anatomy, much employed in medicine. Pericardial fluid is fluid around the heart. Periaortic lymph nodes are lymph nodes around the aorta.
* * *Surrounding or adjacent to the aorta.
* * *peri·aor·tic -ā-'ȯrt-ik adj of, relating to, occurring in, or being the tissues surrounding the aorta
* * *peri·aor·tic (per″e-a-orґtik) near or around the aorta.
Medical dictionary. 2011.