heˈresimachrare.|-mæk| [f.Gr. αἵρεσι-ς heresy + -µαχος fighting: cf.Gr. αἱρεσιοµάχος.] One who fights against heresy. 1824Thirlwall 29 Nov. in Lett. (1881) I. 81 More of the spirit of charity than commonly breathed through the disputations of the old Hæresimach [Tertullian].