PICENUM, (Cæsar, Pliny, Florus); PICENUS AGER, (Cicero, Sallust, Livy, Tacitus); Ager Picentinum, (Varro): a territory of Italy, lying to the east of Umbria, from the Apennine to the Adriatic; on the coast extending from the river Aesis on the north, as far as the Pretetani to the south. In the upper or northern part of their territory the Umbri excluded them from the Apennine, as far as Camerinum, (Strabo); but in the lower or southern part they extended from the Adriatic to the Apennine. A very fruitful territory, and very populous. Picentes, the people, (Cicero); from the singular Picent, (Livy): different from the Picentini on the Tuscan sea, though called so by the Greeks; but Prolemus calls them Picent, as does also Pliny. Their territory at this day is supposed to form the greatest part of the March of Ancona, (Claudianus).