Obs. rare. [a. OF. crastin the morrow, the day after (any feast), ad. L. crāstinum morrow, f. crās tomorrow + -tinus adj. suffix with words of time. Also written crastino after the Latin form in dates, e.g., Crastino Sancti Vincentii, date of Statute of Merton, 20 Hen. 3 (Cowell).] The day after, the morrow; the crastin of Trinity Term = the day after the last day of Trinity Term.
1581–2. Fletewood, Lett., 14 Jan., in Ellis, Orig. Lett., I. 212, II. 284. Sounday being crastino of the Twelfth daye. Ibid. (1585), 7 July, ibid., I. 216, II. 296. Mundaye laste beinge the crastinn of Trinitie Terme.
