Lewis & Short

quinquāgēni, ae, a (gen. plur. quinquagenūm, Plin. 15, 24, 28, § 99 al.: quinquagenorum not found), num. distr. adj. [quinquaginta].

  1. I. Fifty each: in singulos HS. quinquagenis milibus damnari mavultis? Cic. Verr. 2, 3, 28, § 69: sestertia, Suet. Oth. 5.
    In sing.: centena quinquagena fruge fertilis campus, Plin. 17, 5, 3, § 41: quinquageno filo, id. 19, 1, 2, § 11.
  2. II. In gen., fifty: per quinquagenas brumas, Manil. 3, 603; Mart. 12, 66, 1.