aneurism

noun

1. a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall

   noun.state

   Synonyms aneurysm

   Source: WordNet 3.0

2. A soft, pulsating, hollow tumor, containing blood, arising from the preternatural dilation or rupture of the coats of an artery.

   noun

   Source: webster1913