piloerection

noun
pi·lo·erec·tion | \ˌpī-lō-i-ˈrek-shən \

Definition of piloerection 

: erection or bristling of hairs due to the involuntary contraction of small muscles at the base of hair follicles that occurs as a reflexive response of the sympathetic nervous system especially to cold, shock, or fright

Note: Piloerection may also occur as a side effect from the use of a sympathomimetic drug (such as phenylephrine) or as a symptom of opioid withdrawal.

First Known Use of piloerection

1930, in the meaning defined above

History and Etymology for piloerection

Latin pilus "hair" + -o- + erection

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Dictionary Entries near piloerection

Pilobolus

pilocarpine

pilocystic

piloerection

pilomotion

pilon

piloncillo

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The first known use of piloerection was in 1930

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More Definitions for piloerection

piloerection

noun
pi·lo·erec·tion | \ˌpī-lō-i-ˈrek-shən \

Medical Definition of piloerection 

: involuntary erection or bristling of hairs due to a sympathetic reflex usually triggered by cold, shock, or fright or due to a sympathomimetic agent

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