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

| electrostatic unit n. Abbr. esu Any unit of electricity or magnetism in the centimeter-gram-second system based on the forces of interaction between electric charges. |
| esu abbr. electrostatic unit |
| esu electrostatic unit |