D defs.my
Entry 1 sense Webster, 1913

aneurism

/(ăn"ū̇*rĭz'm)/ · an·eu·rism · IPA /ˈæn.jəɹ.ɪz.əm/
01 n. A soft, usually pulsating, sac, containing blood or blood clot, arising from the abnormal dilation of the walls of an artery, vein or heart…
  1. 1.
    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.(Med.)