Meaning of reradiation

re•ra•di•a•tion

Pronunciation: (rē-rā"dē-ā'shun), [key]
— n.
  1. radiation emitted as a consequence of a previous absorption of radiation.
  2. retransmission of signals, a source of interference, due to frequency oscillations in a radio receiver.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.