| pyrophorus | (n) tropical click beetles, Syn. genus Pyrophorus |
| firefly | (n) tropical American click beetle having bright luminous spots, Syn. fire beetle, Pyrophorus noctiluca |
| Pyrophorus | ‖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. [ 1913 Webster ] |