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Webster 1913 Edition
Pyrophorus
‖
Py-roph′o-rus
,Noun.
[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.
Webster 1828 Edition
Pyrophorus
PYROPHORUS
,Noun.