PyrophorusPy*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.
|tropical click beetles|
|a chattering or flighty, light-headed person.|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|