phosphor

A substance that exhibits phosphorescence.

The phosphorescent coating inside the screen of a cathode-ray tube.

The morning star, or Lucifer; the planet Venus, when it precedes the sun and shines in the morning.

[lowercase] Phosphorus.

Phosphorus.

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

Any of various compounds of transition metals or of rare earths that exhibits phosphorescence.

a synthetic substance that is fluorescent or phosphorescent; used to coat the screens of cathode ray tubes