Etymology
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aneurysm (n.)

"dilation of an artery," early 15c., from Medieval Latin aneurisma, from Greek aneurysmos "dilation," from aneurynein "to dilate," from ana "up" (see ana-) + eurynein "widen," from eurys "broad, wide" (see eury-). Related: Aneurysmal; aneurysmic.

updated on October 14, 2021

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Definitions of aneurysm from WordNet

aneurysm (n.)
a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall;
Synonyms: aneurism
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.