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catastalsis in Medicine

catastalsis

(kăt′ə-stôlsĭs, -stăl-)
n.
  1. A downward wave of contraction occurring in the gastrointestinal tract during digestion.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.