and which does not achieve its principal intended action by pharmacological, immunological or metabolic means, in or on the human body, but which may be assisted in its function by such means.
agus nach gcuireann i gcrích an príomhghníomh a beartaíodh di trí mhodhanna cógaseolaíocha, imdhíoneolaíocha nó meitibileacha, i gcorp an duine nó ar chorp an duine, ach a bhféadfadh modhanna den sórt sin a bheith ina gcuidiú ag an bhfeidhmiú aici.