campylobacterPronunciation: /ˈkampɪləʊˌbaktə, ˌkampɪləʊˈbaktə/Definition of campylobacter noun a bacterium which may cause abortion in animals and food poisoning in humans. Genus Campylobacter: several species; curved or spiral Gram-negative bacteria Origin: 1970s: modern Latin, from Greek kampulos 'bent' + bacteriumcampylobacter in other Oxford dictionaries Definition of campylobacter in the US English dictionary