Lewis & Short

tentātor, ōris, m. [tento].

  1. I. An assailant, attempter, tempter: integrae Dianae (Orion), Hor. C. 3, 4, 71.
    Esp., the tempter, i. e. the devil, Vulg. Matt. 4, 3; Juvenc. 1, 384.
  2. II. He who attacks: autumnus, tentator valetudinum, Tert. Anim. 48 init.