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aneurysm
The definition of an aneurysm is a blood-filled sac in the weakened wall of a blood vessel or the heart.
(noun)An abnormal outward bulging of one of the blood vessels in the brain is an example of an aneurysm.
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See aneurysm in Webster's New World College Dictionary
or aneurism
noun
a sac formed by local enlargement of the weakened wall of an artery, a vein, or the heart, caused by disease or injury
Origin: ModL aneurisma < Gr aneurysma < ana-, up + eurys, broad: see eury-
Related Forms:
- aneurysmal adjective or aneurismal
See aneurysm in American Heritage Dictionary 4
also an·eu·rism
noun A localized, pathological, blood-filled dilatation of a blood vessel caused by a disease or weakening of the vessel's wall.
Origin:
Origin: Middle English aneurisme
Origin: , ultimately from Greek aneurusma
Origin: , from aneurein, to dilate
Origin: : ana-, throughout; see ana-
Origin: + eurus, wide
.Related Forms:
- anˌeu·rysˈmal (-məl) adjective
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