mediastinum

mediastinum definition - medical

me·di·as·ti·num (mēˌdē-ə-stīˈnəm)

noun pl. me·di·as·ti·na (-nə)
  1. A septum between two parts of an organ or a cavity.
  2. The region in mammals between the pleural sacs, containing the heart and all of the thoracic viscera except the lungs. Also called interpleural space, mediastinal space.

Related Forms:

  • meˌdi·as·tiˈnal (-nəl) adjective

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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