Ῥωμαϊστί
From LSJ
τὸ ἐγδοχῖον τοῦ ὕδατος καὶ τὰ ἐν τῆι πόλει ὑδραγώγια → the water reservoir and the conduits in the city (or on the acropolis)
English (LSJ)
Adv. in Latin, App.Mith.2, Plu.2.318d, etc.
German (Pape)
[Seite 854] adv., auf römische Art, in römischer Sprache, auf römisch, Plut. Rom. 5 A.
Greek (Liddell-Scott)
Ῥωμαϊστί: Ἐπίρρ., Λατινιστί, Ἀππ. Μιθρ. 2, Πλούτ. 2. 318D, κ. ἀλλ.
English (Strong)
adverb from a presumed derivative of Ῥώμη; Romaistically, i.e. in the Latin language: Latin.
English (Thayer)
adverb, in the Roman fashion or language, in Latin: Epictetus diss. 1,17, 16; Plutarch, Appian, others.)