Aneurysm Definition

anyo͝orizəm, anyərizəm
aneurysms
noun
aneurysms
A sac formed by local enlargement of the weakened wall of an artery, a vein, or the heart, caused by disease or injury.
Webster's New World
An abnormal, blood-filled sac formed by dilation of the wall of a blood vessel or heart ventricle, most commonly the abdominal aorta and intracranial arteries, resulting from disease or trauma to the wall, as in atherosclerosis.
American Heritage Medicine

(pathology) An abnormal blood-filled swelling of an artery or vein, resulting from a localized weakness in the wall of the vessel.

Wiktionary
Synonyms:
  • aneurism

Other Word Forms of Aneurysm

Noun

Singular:
aneurysm
Plural:
aneurysms

Origin of Aneurysm

  • Middle English aneurisme ultimately from Greek aneurusma from aneurein to dilate ana- throughout ana– eurus wide

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek ἀνεύρυσμα (aneurysma, “a widening, an opening”), from ἀνά (ana, “up”) + εὐρύς (eurys, “wide”).

    From Wiktionary

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