Lewis & Short

in-crēdŭlus, a, um (perh. not anteAug.).

  1. I. Act., unbelieving, incredulous, without faith: odi. Hor. A. P. 188: patronus, Quint. 12, 8, 11: quidam, id. 10, 3, 11: Judaei, Vulg. Act. 14, 2 al.
  2. II. Pass., incredible: res, Gell. 9, 4, 3.