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pyrotechnics
pyroxene
pyroxenite
pyroxylin
pyrrhic
Pyrrhic victory
Pyrrhonism
pyrrhotite
pyrrole
pyruvate
pyruvic acid
Pythagorean theorem
Pythagoreanism
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pyrophoric

py·ro·phor·ic [ prə fáwrik ]


adjective 
Definition:
 
1. igniting spontaneously: bursting into flames spontaneously when exposed to air

2. producing sparks when struck: giving off sparks when struck or scraped

[Mid-19th century. < Greek purophoros "fire-bearing" < pur "fire"]
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