† tyˈrannial,a.Obs. [f. L. tyrann-us tyrant + -ial.] = tyrannic. 1651J. Jane Εικων ακλαστος 216 Mahometts..Tyraniall vsurpation.1788Priestley Lect.Hist. v. xl. 291 The very names which have been used to express these tyrannial governments have grown..odious.