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aortic vestibule in Medicine

aortic vestibule

n.
  1. The part of the left ventricle of the heart below the aortic orifice that allows room for segments of the closed aortic valve.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.