Pronunciation: (fos"fu-res'uns), [key]
1. the property of being luminous at temperatures below incandescence, as from slow oxidation in the case of phosphorus or after exposure to light or other radiation.
2. a luminous appearance resulting from this.
3. any luminous radiation emitted from a substance after the removal of the exciting agent.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.