Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

vīcēsĭmus or vīcensĭmus (collat. form vīgēsĭmus, Varr. R. R. 3, 9, 21; Caes. B. C. 3, 34; Sall. C. 47, 2; Col. 5, 1, 10; Manil. 4, 462 al.; but not in Cic.), a, um, ord. num. adj. [viginti], the twentieth.

  1. I. Adj.: annus, Plaut. Capt. 5, 3, 3: intra annum vicesimum, Caes. B. G. 6, 21: annum jam tertium et vicesimum regnat, Cic. Imp. Pomp. 3, 7: censores vicesimi sexti a primis censoribus, Liv. 10, 47, 2: litteras mihi Cornificius altero vicesimo die reddidit, Cic. Fam. 12, 25, 1: Acastus cum litteris praesto fuit uno et vicesimo die, id. ib. 14, 5: vicesimo die lunae, id. Fin. 2, 31, 101: vicesima luna sacrificant, Plin. 35, 2, 2, § 5: sexto et vicesimo anno, Nep. Lys. 1, 1: legio, Tac. A. 1, 51.
  2. II. Subst.: vīcēnsĭ-ma (-suma), ae, f. (i. e. pars), the twentieth part, as a tax; so the twentieth part or five per cent. of the crop, Liv. 43, 2, 12 Weissenb. ad loc.; of the value of a slave that was manumitted, Cic. Att. 2, 16, 1; Liv. 7, 16, 7; Petr. 58; 71.
    Called also VICESIMA LIBERTATIS, Inscr. Orell. 3131; 3338.
    As exportduty: portorii, Cic. Verr. 2, 2, 75, § 185.
    As a tax on inheritances, Plin. Ep. 7, 14, 1; id. Pan. 37.