Lewis & Short

dētrectātor (dētract-), ōris, m. [detrecto].

  1. * I. One who declines or refuses: ministerii, Petr. 117, 11.
  2. II. A diminisher, disparager: laudum suarum, Liv. 34, 15, 9: honorum, Aus. Idyll. 2, 51.