1858, as a proposed word for "electricity," from pyro- + -gen. Meaning "fever-producer" is from 1896. Related: Pyrogenic; pyrogenetic. Greek pyrogenes meant "born in fire, wrought by fire."
pyrexia
pyrgologist
pyrite
pyro-
pyroclastic
pyrogen
pyrolatry
pyrolusite
pyrolysis
pyromania
pyromaniac
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