pilomotor reflex

Medical Dictionary

pilomotor reflex n.
Contraction of the smooth muscle of the skin caused by mild application of a tactile stimulus or by local cooling and resulting in goose bumps.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
pilomotor reflex

noun
reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation 
WordNet® 3.0, © 2006 by Princeton University.
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