過か電でん圧あつMeaningsNoun1. overpotential; over-voltageKanji used過surpass something電electric圧pressurePitch accentかでんあつComposed of過かsurplus-; excess-; over-; per- (chemical with more of a certain element than found in other compounds of the same constituents)Prefix電でん圧あつvoltageNoun