microcharge

plural microcharges

1. A very small charge (in various senses).

   The purpose of the many microcharges is to help avoid, or at least limit, broader tax increases.

   2009 August 30, David Kocieniewski, “What’s Next, a Breathing Surcharge?”, in New York Times

   1 more example

   Perhaps it is proper here to notice that the motion of each microcharge is determined by the magnitude and direction of electric field in the vicinity of the point where this charge is located[…]

   1992, Alexander A. Kaufman, Geophysical Field Theory and Method, page 252