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vomiting reflex

n.
  1. Contraction of the abdominal muscles with relaxation of the cardiac sphincter of the stomach and of the muscles of the throat elicited by a variety of stimuli, especially by a stimulus applied to the fauces.pharyngeal reflex
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.