phosphorescence

phos·pho·res·cence

noun \-ˈre-s^ən(t)s\

Definition of PHOSPHORESCENCE

1

: luminescence that is caused by the absorption of radiations (as light or electrons) and continues for a noticeable time after these radiations have stopped — compare fluorescence

2

: an enduring luminescence without sensible heat

First Known Use of PHOSPHORESCENCE

1796

phos·pho·res·cence

noun \-ˈres-^ən(t)s\   (Medical Dictionary)

Medical Definition of PHOSPHORESCENCE

1

: luminescence that is caused by the absorption of radiation at one wavelength followed by delayed reradiation at a different wavelength and that continues for a noticeable time after the incident radiation stops

2

: an enduring luminescence without sensible heat

phosphorescence

noun    (Concise Encyclopedia)

Emission of light from a substance exposed to radiation and persisting as an afterglow after the exciting radiation has been removed. Unlike fluorescence, in which the absorbed light is emitted about 10⁸ second after excitation, in phosphorescence the extra energy absorbed is stored in metastable states and reemitted later. Phosphorescence may last from about 10³ second to days or even years. The term phosphorescence is often applied to luminescence of living organisms, as well.