Isocōlon (ἰσόκωλον having equal members) is the use of two or more sequent cola (clauses) containing an equal number of syllables.
τοῦ μὲν ἐπίπονον καὶ φιλοκίνδῡνον τὸν βίον κατέστησεν, τῆς δὲ περίβλεπτον καὶ περιμάχητον τὴν φύσιν ἐποίησεν the life of the one he rendered full of toil and peril, the beauty of the other he made the object of universal admiration and of universal contention 10.16.