Dertōna, ae, f.,
a city in Liguria , now Tortona , Plin. 3, 5, 7, § 49; Brut. ap. Cic. Fam. 11, 10, 5; Vell. 1, 15.
DERTO´NA(Δέρθων, Strab. 5. p. 217; Δερτῶνα, Ptol. 3.1.35: Tortona), an important city of Liguria, si...
Dictionary of Greek and Roman Geography