statcoulomb

The unit of electric charge in the centimeter-gram-second electrostatic system of units. That point charge which repels an equal point charge at a distance of 1 centimeter with a force of one dyne.

Sometimes called an escoulomb.¹

1.
For example, see page 387 of:
Members of the Physics Staff of the University of Pittsburgh.
An Outline of Atomic Physics. 2nd Ed.
New York: John Wiley & Sons, 1937.