psychoneuroimmunologyPronunciation: /ˌsʌɪkə(ʊ)ˌnjʊərəʊˌɪmjʊˈnɒlədʒi/Definition of psychoneuroimmunology noun [mass noun] Medicine the study of the effect of the mind on health and resistance to disease. psychoneuroimmunology in other Oxford dictionaries Definition of psychoneuroimmunology in the US English dictionary