Home › Words › M › marcellianismmarcellianismmarcellianism means the religious doctrines of the Marcellians.Among words judged in Lexicurio's Arena, marcellianism ranks #35,669 of 42,752 for Qualifying.EtymologyFrom Marcellian + -ism.nounThe religious doctrines of the Marcellians.Definitions & examples from Wiktionary (CC BY-SA 3.0).