- a force between two elementary particles resulting from the exchange of a virtual particle
- the force causing the alignment of the magnetic dipole moments of atoms in ferromagnetic materials
- A force that results from the continuous interchange of particles between two or more bodies. The exchange of electrons between two atoms or molecules, for example, is an exchange force, as is the exchange of gluons between quarks in the strong nuclear force.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.