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Pronunciation: fen'es-tra'shun


  1. The presence of openings or fenestrae in a part.
  2. Making openings in a dressing to allow inspection of the parts.
  3. In dentistry, a surgical perforation of the mucoperiosteum and alveolar process to expose the root tip of a tooth to permit drainage of tissue exudate.
  4. An operation to create an opening in the horizontal semicircular canal to improve hearing in otosclerosis.
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.