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familial dysautonomia

n.
  1. A congenital disorder involving the nervous system, especially the functioning of the autonomic nervous system, and including such symptoms as indifference to pain, diminished secretion of tears, poor vasomotor control, motor incoordination, difficulty in swallowing and emotional instability.Riley-Day syndrome
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.