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elec'tron spin' res"onance

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 elec'tron paramagnet'ic res"onance, spin resonance.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

electron-ray tubeelectron telescope
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