The Collaborative International Dictionary
Procatarxis
Procatarxis \Pro`cat*arx"is\, n. [NL., fr. Gr. ? first
beginning.] (Med.)
The kindling of a disease into action; also, the procatarctic
cause.
--Quincy.
Wiktionary
procatarxis
n. (context medicine dated English) The kindle of a disease into action; the procatarctic cause.