pneumatocele

[nōōmə-tō-sēl′, nōō-mătə-]
n.
  1. A emphysematous or gaseous swelling.
  2. pneumonocele
  3. A thin-walled cavity formed within the lung, characteristic of staphylococcus pneumonia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.