Petronian UK /pɪˈtɹəʊ.ni.ən/US /pəˈtɹoʊ.ni.ən/ adjective1 •Of or relating to Petronius (Gaius Petronius Arbiter, c. 27–66 AD), a Roman courtier during the reign of Nero, generally believed to be the author of Satyricon. formsmore Petronian · most Petronian