antinociception

noun
an·ti·no·ci·cep·tion | \ ˌant-i-ˌnō-si-ˈsep-shən, ˌan-ˌtī- \

Medical Definition of antinociception 

: the action or process of blocking the detection of a painful or injurious stimulus by sensory neurons Compared with systemic narcotic analgesia, intraspinal narcotic antinociception has a longer duration. —Dennis W. Coombs, The Journal of the American Medical Association, 4 Nov. 1983

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