cyst

cyst definition - medical

cyst (sĭst)

noun
  1. An abnormal membranous sac containing a gaseous, liquid, or semisolid substance.
  2. A sac or vesicle in the body.
  3. A small capsulelike sac that encloses certain organisms in their dormant or larval stage.

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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