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ascending lumbar vein in Medicine

ascending lumbar vein

n.
  1. A vein that arises from the sacral and lumbar veins and at the diaphragm becomes the azygos vein on the right side and the hemiazygos vein on the left.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.