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nocifensor

(nō′sĭ-fĕnsər)
n.
  1. A process or mechanism that acts to protect the body from injury.
  2. A system of nerves in the skin and mucous membranes that react to adjacent injury by causing vasodilation.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.