aneurism

from WordNet (r) 3.0 (2006)

aneurism
    n 1: a cardiovascular disease characterized by a saclike
         widening of an artery resulting from weakening of the
         artery wall [syn: {aneurysm}, {aneurism}]

from The Collaborative International Dictionary of English v.0.48

aneurism \an"eu*rism\, aneurysm
\an"eu*rysm\([a^]n"[-u]*r[i^]z'm), n. [Gr. 'aney`rysma,
   'aneyrysmo`s, a widening, an opening; 'ana` up + e'yry`s
   wide.] (Med.)
   A soft, usually pulsating, sac, containing blood or blood
   clot, arising from the abnormal dilation of the walls of an
   artery, vein or heart. The more common spelling is aneurysm.
   [1913 Webster + AS] Aneurysmal