pyrogen (n.)youdaoicibaDictYouDict[pyrogen 词源字典]
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."[pyrogen etymology, pyrogen origin, 英语词源]
pyrotoxinyoudaoicibaDictYouDict
" Medicine . A pyrogen; specifically a pyrogenic bacterial toxin. Now rare", Late 19th cent.; earliest use found in The Lancet. From pyro- + toxin.