Lewis & Short

strātor, ōris, m. [sterno, II. A.],

  1. I. one who saddles a horse, a groom, equerry (postclass.), Dig. 1, 16, 4; Spart. Carac. 7; Amm. 30, 5, 19; 29, 3, 5; Cod. Th. 6, 31; Cod. Just. 1, 27, 1 med.; Inscr. Orell. 798; 1584; 3250 al.
  2. II. From sterno, II. B., a thrower down, Vulg. Jer. 48, 12.