n. 动脉瘤

[ noun ]
a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall
<noun.state>

Aneurism \An"eu*rism\, n. [Gr. ?, ?, a widening, an opening; ?
up + ? wide.] (Med.)
A soft, pulsating, hollow tumor, containing blood, arising
from the preternatural dilation or rupture of the coats of an
artery. [Written also {aneurysm}.]