noun. An abnormal, blood-filled sac formed by dilation of the wall of a blood vessel or heart ventricle, most commonly the abdominal aorta and intracranial arteries, resulting from disease or trauma to the wall, as in atherosclerosis.

noun. a sac-like widening of a blood vessel.

noun. An abnormal blood-filled swelling of an artery or vein, resulting from a localized weakness in the wall of the vessel.

noun. a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall

"Even more surprising, given the fear the word "aneurysm" strikes in patients with new diagnoses and their families, is that many small unruptured aneurysms are not treated."

aneurysmal  aneurysmatic  

cardiovascular disease  

aortic aneurysm  cerebral aneurysm  intracranial aneurysm  ventricular aneurysm  

aneurism  aorta  aortic  atherosclerosis  dilatation