English word procarcinogen comes from English pro-, English carcinogen (A substance or agent that can cause cancer.)

Detailed word origin of procarcinogen

Dictionary entry	Language	Definition
pro-	English (eng)	Agreeing with; supporting; favouring. Substituting for Earlier; prior. In front of. Rudimentary.
carcinogen	English (eng)	A substance or agent that can cause cancer.
procarcinogen	English (eng)	Any substance that is transformed into a carcinogen by metabolism.

Words with the same origin as procarcinogen