I.on the third day, used with Verbs so as to agree with the subject, τριταῖοι ἐγένοντο ἐν τῇ Ἀττικῇ Hdt.; ἐσβεβληκὼς τριταῖος ἐς Μηλιέας having invaded Melis three days before, id=Hdt.; τρ. γενόμενος after being three days dead, id=Hdt.:— τριταῖος (sc. πυρετός), a tertian fever, Plat.
II.of events, lasting three days, Eur.
III.generally for τρίτος, id=Eur.