Source : Webster's Revised Unabridged Dictionary (1913)

Fulguration \Ful"gu*ra`tion\, n. [L. fulguratio: cf. F.
   fulguration.]
   1. The act of lightening. [R.] --Donne.

   2. (Assaying) The sudden brightening of a fused globule of
      gold or silver, when the last film of the oxide of lead or
      copper leaves its surface; -- also called {blick}.

            A phenomenon called, by the old chemists,
            fulguration.                          --Ure.