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aortic window in Medicine

aortic window

n.
  1. A radiolucent region, located below the aortic arch, formed by the bifurcation of the trachea, and traversed by the left pulmonary artery.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.