Tropical click beetles

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
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 ...

Wiktionary Word definitions in Wiktionary
n. a substance capable of taking fire spontaneously on exposure to the air, especially in a finely divided state

Wikipedia Word definitions in Wikipedia
Pyrophorus (also known as Fire Beetles) is a genus of click beetle (family Elateridae ). They are one of several genera in the tribe Pyrophorini , all of which are bioluminescent . Their bioluminescence is similar to that of another group of beetles, the ...