Meaning of London forces

Lon'don forc'es

Pronunciation: [key]
— Physics, Chem. Physics,Chem.
  1. forces between atoms or molecules that are related to the physical rather than the chemical properties of the molecules and that are attractive when the particles are in the lowest energy state.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.