electron spin resonance: Meaning and Definition of

elec'tron spin' res"onance

Pronunciation: [key]
— Physics. Physics.
  1. the flipping back and forth between two spin directions of electrons in a magnetic field when electromagnetic radiation of the proper frequency is applied. Abbr.: ESR Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.