Source : Webster's Revised Unabridged Dictionary (1913)

Pyrophorus \Py*roph"o*rus\, n. [NL. See {Pyrophorous}.] (Old
   Chem.)
   Any one of several substances or mixtures which phosphoresce
   or ignite spontaneously on exposure to air, as a heated
   mixture of alum, potash, and charcoal, or a mixture of
   charcoal and finely divided lead.

Source : WordNet®

Pyrophorus
     n : tropical click beetles [syn: {genus Pyrophorus}]