*electro-motive*

a. Producing electro-motion; producing, or tending to produce, electricity or an electric current; causing electrical action or effects. [ 1913 Webster ]

Electro-motive force (Physics), the force which produces, or tends to produce, electricity, or an electric current; sometimes used to express the degree of electrification as equivalent to potential, or more properly difference of potential. [ 1913 Webster ]