phosphor Meaning, Definition & Usage

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

WordNet

Phos"phor noun
Etymology
Cf. G. phosphor. See Phosphorus.
Definitions
  1. Phosphorus. Obs. Addison.
  2. The planet Venus, when appearing as the morning star; Lucifer. Poetic Pope. Tennyson.

Webster 1913