| Ao | a verb tense in some languages (classical Greek |
|---|---|
| Ao | (grammar) of or relating to the aorist tense |
| Ao | the large trunk artery that carries blood from the left ventricle of the heart to branch arteries |
| Ao | of or relating to the aorta |
| Ao | of or relating to the aorta |
| Ao | an aneurysm of the aorta |
| Ao | the part of the aorta that arches and turns downward |
| Ao | the orifice from the lower left chamber of the heart to the aorta |
| Ao | a plexus of lymph nodes in the lower portion of the abdominal aorta |
| Ao | abnormal narrowing of the aortic valve |
| Ao | a semilunar valve between the left ventricle and the aorta |
| Ao | inflammation of the aorta |