Definition of Cerebral aneurysm
Cerebral aneurysm: A localized widening of a blood vessel within the brain. An aneurysm is a localized widening (dilatation) of an artery or vein within the brain. At the area of an aneurysm, there is typically a bulge and the wall is weakened and may rupture. The word "aneurysm" comes from the Greek "aneurysma" meaning "a widening."
Medically reviewed by Martin Zipser, MD; Board Certified: Surgery
Last Editorial Review: 5/12/2014
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?