Source : Webster's Revised Unabridged Dictionary (1913)

Incandescence \In`can*des"cence\, n. [Cf. F. incandescence.]
   A white heat, or the glowing or luminous whiteness of a body
   caused by intense heat.

Source : WordNet®

incandescence
     n 1: the phenomenon of light emission by a body as its
          temperature is raised [syn: {glow}]
     2: light from heat