The Collaborative International Dictionary of English v.0.48:

Excandescence \Ex`can*des"cence\, n. [L. excandescentia.]
   1. A growing hot; a white or glowing heat; incandescence.
      [R.]
      [1913 Webster]

   2. Violent anger; a growing angry. [Obs.] --Blount.
      [1913 Webster]