electrostatic unit

noun Electricity.

1. a unit, as a statampere, in the system of electric units derived from the force of repulsion between two static charges. Abbreviation: esu, ESU

noun

1. any unit that belongs to a system of electrical cgs units in which the electric constant is given the value of unity and is taken as a pure numberAbbreviation: ESU, e.s.u. Compare electromagnetic unit