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}.]
aneurysm n : a cardiovascular disease characterized by a sac-like widening of an artery resulting from weakening of the artery wall [syn: {aneurism}]