trilogia

(τριλογία). A set of three tragedies which, together with a satyric drama, formed a tetralogy. The several tragedies were generally, but not always, connected with each other in subject. The only surviving example is the Oresteia of Aeschylus, consisting of the Agamemnon, Choephoroe, and Eumenides. See Heimsoeth, De Tragoediae Graecae Trilogiis (1869); and the articles drama; tetralogia.