1) Light 
• (a.) Shining with a phosphoric light; luminous without sensible heat. • (n.) A phosphorescent substance.
Having the property of phosphorescence. ... (05 Mar 2000) ... 
Phos`phor·es'cent adjective [ Confer French phosphorescent .] Shining with a phosphoric light; luminous without sensible heat. -- noun A phosphorescent substance. 
Type: Term Pronunciation: fos′fŏ-res′ĕnt Definitions: 1. Having the property of phosphorescence.
[adj] - emitting light without appreciable heat as by slow oxidation of phosphorous
phosphorescent 1. Continuing to emit light after the source of stimulating radiation has been removed. 2. Having the property of shining in the dark; luminous without combustion or without sensible heat; self-luminous.
adjective emitting light without appreciable heat as by slow oxidation of phosphorous; `the phosphorescent glow of decaying wood`