nociceptorPronunciation: /ˈnəʊsɪˌsɛptə/Definition of nociceptor noun Physiology a sensory receptor for painful stimuli: the heat from eating chillies produces ‘nociceptor firing’Origin: early 20th century: from Latin nocere 'to harm' + receptornociceptor in other Oxford dictionaries Definition of nociceptor in the US English dictionary