pyrogen

noun
py·​ro·​gen | \ ˈpī-rə-jən How to pronounce pyrogen (audio) \

Definition of pyrogen

: a fever-producing substance

First Known Use of pyrogen

1875, in the meaning defined above

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The first known use of pyrogen was in 1875

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pyrogen

noun
py·​ro·​gen | \ ˈpī-rə-jən How to pronounce pyrogen (audio) \

Medical Definition of pyrogen

: a fever-producing substance (as various thermostable products of bacterial metabolism)

More from Merriam-Webster on pyrogen

Britannica.com: Encyclopedia article about pyrogen

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