pyrophorus
  引火物
  Py·roph·o·rus n.  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.
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  Pyrophorus
       n : tropical click beetles [syn: genus Pyrophorus]