Anio
or, anciently,
Anien. A river rising in the mountains of the Hernici,
near Treba, which, after receiving the brook Digentia, forms at Tibur
beautiful water-falls, and flows into the Tiber three miles above Rome. The water of the Anio
was conveyed to Rome by two aqueducts—the
Anio vetus and
Anio
novus.