Early 20th century; earliest use found in Political Science Quarterly. From post-classical Latin monarchomachus. Compare French monarchomaque, adjective, Portuguese monarcómaco, adjective.
Definition of monarchomach in US English:
monarchomach
nounməˈnɑːkə(ʊ)mak
historical
A republican; an anti-monarchist.
Origin
Early 20th century; earliest use found in Political Science Quarterly. From post-classical Latin monarchomachus. Compare French monarchomaque, adjective, Portuguese monarcómaco, adjective.