py·ro·phor·ic | \ˌpī-rə-ˈfȯr-ik, -ˈfär-\

Definition of pyrophoric 

1 : igniting spontaneously

2 : emitting sparks when scratched or struck especially with steel

Examples of pyrophoric in a Sentence

Recent Examples on the Web

Intel, Nov. 11, 1986 (Aloha): A pyrophoric gas silane cylinder leaks through a valve and catches fire. Mike Rogoway,, "Portland startup reports $8 million investment," 17 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pyrophoric.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pyrophoric

1788, in the meaning defined at sense 1

History and Etymology for pyrophoric

New Latin pyrophorus, from Greek pyrophoros fire-bearing, from pyr- + -phoros carrying — more at -phore

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The first known use of pyrophoric was in 1788

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