albigensianism: a Christian movement considered to be a medieval descendant of Manichaeism in southern France in the 12th and 13th centuries; characterized by dualism (asserted the coexistence of two mutually opposed principles, one good and one evil); was exterminated for heresy during the Inquisition
christianity: a monotheistic system of beliefs and practices based on the Old Testament and the teachings of Jesus as embodied in the New Testament and emphasizing the role of Jesus as savior
m: the 13th letter of the Roman alphabet