nociception

noun
no·​ci·​cep·​tion | \ˌnō-sə-ˈsep-shən \

Medical Definition of nociception 

: the perception of a painful or injurious stimulus In reality, [infants] have all the anatomical and functional components required for nociception, and they react appropriately to painful stimuli.— Thomas E. Wiswell, The New England Journal of Medicine, 24 Apr. 1997

called also nociperception

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