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thoracic cavity in Medicine

thoracic cavity

n.
  1. The space within the walls of the chest, bounded below by the diaphragm and above by the neck, and containing the heart and the lungs.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.