Sac-like bulging on one side of an artery. Usually arises at an arterial branching.
an outpouching or dilation on one side of the blood vessel
a rounded or pouch-like sac of blood that is attached by a neck or stem to an artery or a branch of a blood vessel
A "bulge" on one side of an artery.
A balloon-like outpouching of a vessel (the more common type of aneurysm).