n. [ L. fulguratio: cf. F. fulguration. ] 1. The act of lightening. [ R. ] Donne. [ 1913 Webster ]

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. [ 1913 Webster ]

A phenomenon called, by the old chemists, fulguration. Ure. [ 1913 Webster ]