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proctospasm

(prŏk′tə-spăz′əm)
n.
  1. Spasmodic stricture of the anus.
  2. Spasmodic contraction of the rectum.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.