Lewis & Short

† necrŏmantīa (-ēa), ae, f., = νεκρομαντεια,

  1. I. an evoking of the dead to reveal the future, necromancy, Lact. 2, 16 init., Aug. Civ. Dei, 7, 35.
  2. II. Necromantea Homeri, that part of the Odyssey in which Ulysses descends into the infernal regions, Plin. 35, 11, 40, § 132.