startle reaction

/ˌstɑrdl riˌækʃən/
IPA guide

Definitions of startle reaction
  1. noun
    a complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise); involves flexion of most skeletal muscles and a variety of visceral reactions
    synonyms: startle response
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    type of:
    jump, start, startle
    a sudden involuntary movement
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