Phosphorescence

noun

1. Persistent emission of light following exposure to and removal of incident radiation.
2. Emission of light without appreciable heat, as from chemiluminescence of phosphorus or bioluminescence of living organisms.
3. The state or character of being phosphorescent; the property which certain bodies possess of becoming luminous without undergoing combustion.
4. The quality or state of being phosphorescent; or the act of phosphorescing.
5. A phosphoric light.