noun. ['ˈænjʊˌrɪzəm, ˈænjʊˌrɪzm'] a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall.
1. Noun, singular or mass Head trauma, stroke, aneurism, tumors, infections, blockage or lack of blood supply, childhood virus or multiple sclerosis are some conditions that may be responsible for the disorder.