poloidalPronunciation: /pəˈlɔɪd(ə)l/Definition of poloidal adjective Physics relating to or denoting a magnetic field associated with a toroidal electric field, in which each line of force is confined to a radial or meridian plane. Origin: 1940s: from polar, on the pattern of toroidalpoloidal in other Oxford dictionaries Definition of poloidal in the US English dictionary