- Protruding sac in the wall of a vein, artery, or heart, frequently caused by microbial infection; may present as pain, pressure on nearby organs, or cardiac weakening.
Definition from: CRISP Thesaurus via Unified Medical Language System at the National Library of Medicine
- A sac formed by the dilatation of the wall of an artery, a vein, or the heart.
Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
- An abnormal blood-filled dilatation of a blood vessel and especially an artery resulting from disease of the vessel wall.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
See also Understanding Medical Terminology.