Lewis & Short

quīni, ae, a (gen. plur. quinum, Col. 4, 30; Pandect. 40, 9, 5: quinorum not found), num. distr. adj. [quinque].

  1. I. Five each: quini in lectulis, Cic. Pis. 27, 67: pedes, Caes. B. G. 3, 73: ordines, id. ib. 7, 23: versus, Nep. Att. 18, 6: milia peditum, Liv. 8, 8: ova pariunt, Col. 8, 14, 5: aureorum, Dig. 40, 9, 5.
  2. II. In gen., five: minae, Plaut. Ps. 1, 3, 111: bis quinos silet dies, Verg. A. 2, 126: armenta, id. ib. 7, 538: nomina principum, Liv. 28, 26.
    In sing.: lex me perdit quina vicenaria, i.e. a law invalidating contracts entered into before the age of twenty-five (the lex Plaetoria; v. Cic. Off. 1, 15, 61), Plaut. Ps. 1, 3, 69: scrobes non altiores quino semipede, i. e. two feet and a half, Plin. 17, 11, 16, § 80.