Dictionary

pyrogen

noun py·ro·gen \ˈpī-rə-jən\

Definition of PYROGEN

:  a fever-producing substance

Origin of PYROGEN

International Scientific Vocabulary
First Known Use: 1875

pyrogen

noun py·ro·gen \ˈpī-rə-jən\   (Medical Dictionary)

Medical Definition of PYROGEN

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

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