having uniform electric potential throughout, as a hot cathode indirectly heated by a separate heater circuit so that there is no lateral change of voltage across the cathode due to resistance to a heating current. · unipotent. Found on https://www.infoplease.com/dictionary/unipotential
1) Unipotent 
having uniform electric potential throughout, as a hot cathode indirectly heated by a separate heater circuit so that there is no lateral change of voltage across the cathode due to resistance to a heating current. · unipotent.