phosphor

n. substance that produces light when subjected to radiation

A phosphor is a substance that exhibits the phenomenon of phosphorescence (sustained glowing after exposure to light or energised particles such as electrons).The chemical element phosphorus (Greek. phosphoros, meaning "light bearer") was discovered by German alchemist Hennig Brand in 1669. Working in Hamburg, Brand attempted to distill some kind of "life essence" from his urine, and in the process produced a white material that glowed in the dark. Since that time, the term phosphorescence has been used to describe substances that shine in the dark without burning.
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n. phosphor, substance that produces light when subjected to radiation

(n.)
The planet Venus, when appearing as the morning star; Lucifer.
  

(n.)
Phosphorus.
  

m phosphorus