Pyrophoric definition

pīrə-fôrĭk
Spontaneously igniting in air.
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Producing sparks by friction.
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Capable of igniting spontaneously when exposed to air, as certain finely divided metals.
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Spontaneously igniting in air, especially when in a finely divided state.
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Producing sparks, especially by friction.
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(fire investigation) Able to oxidize with exposure to atmospheric oxygen at normal temperatures.
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Origin of pyrophoric

  • From pyrophorus substance that ignites spontaneously from Greek purophoros fire-bearing puro- pyro- -phoros -phorous

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Ancient Greek πυροφόρος (purophoros, “fire-bearing") +"Ž -ic.

    From Wiktionary