pri·ma·tial \prīˈmāshəl\adjective Etymology: French, from Middle French, from Medieval Latin primatialis, from primatia primacy + Latin -alis -al — more at primacy 1.: of, relating to, or characteristic of a primate < was deprived of his primatial authority — F.M.Stenton > 2.: having primacy : principal < the primatial city of ancient Ireland — W.G.Carleton >