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arteriosclerotic aneurysm

n.
  1. The most common type of aneurysm, occurring in the abdominal aorta and other large arteries primarily in the older persons, due to weakening of the tunica media by severe atherosclerosis.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.