Lewis & Short

Ăcerrae, ārum, f.

  1. I. A town in the interior of Campania, N. E. of Naples, now Acerra, exposed to frequent inundations from the Clanius, on which it is situated; hence in Verg.: vacuis Clanius non aequus Acerris, G. 2, 225 Wagner; imitated by Silius, 8, 538.
    Deriv.,
    1. B. Ăcerrāni, ōrum, m., the inhabitants of A., Liv. 27, 3, 6; Vell. 1, 14, 4; Plin. 3, 5, 9, § 63.
  2. II. A town in Umbria, called, for the sake of distinction, Acerrae Vatriae, now Gerrha, Plin. 3, 14, 19, § 114.