Meaning of resonance radiation

res'onance radia"tion

Pronunciation: [key]
— Physics. Physics.
  1. radiation emitted by an atom or molecule, having the same frequency as that of an incident particle, as a photon, and usually involving a transition to the lowest energy level of the atom or molecule.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.