electron spin resonance

noun Physics.

the flipping back and forth between two spin directions of electrons in a magnetic field when electromagnetic radiation of the proper frequency is applied. Abbreviation: ESR

Nearby words

  1. electron optics,
  2. electron pair,
  3. electron paramagnetic resonance,
  4. electron probe microanalysis,
  5. electron radiography,
  6. electron telescope,
  7. electron transport,
  8. electron tube,
  9. electron volt,
  10. electron-neutrino

Origin of electron spin resonance

First recorded in 1950–55

Also called electron paramagnetic resonance, spin resonance.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for electron spin resonance

electron spin resonance


a technique for investigating paramagnetic substances by subjecting them to high-frequency radiation in a strong magnetic field. Changes in the spin of unpaired electrons cause radiation to be absorbed at certain frequenciesAbbreviation: ESR See also nuclear magnetic resonance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for electron spin resonance

electron spin resonance


A spectrometric method, based on measurement of the spins of unpaired electrons in a magnetic field, for detecting and estimating free radicals in organic reactions.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.