Liddell-Scott-Jones

τριταῖος (tritaios) three days ^G:A

τριταῖος-αῖος, α, ον,

on the third day, used with Verbs so as to agree with the subject, τριταῖοι ἐγένοντο ἐν τῇ Ἀττικῇ [Refs 5th c.BC+]which will blow in three days, [Refs 5th c.BC+]; τ. ἐκφορά a funeral three days after death, [Refs 5th c.BC+]three days before, [Refs 5th c.BC+]

__II three days old, ἰχθύδια τ. [Refs 5th c.BC+]of three days' standing, [Refs 3rd c.BC+]; ἐπεὰν τ. γένωνται after being three days dead, [Refs 5th c.BC+]
__II.2 τριταῖος (i.e. πυρετός), ὁ, tertian fever or ague, [Refs 5th c.BC+]
__III of days, third, τ. φέγγος, ἡμέρα, [Refs 5th c.BC+]