a. and sb. Obs. rare. 4 Also tri-, tryenal(e, -ennal(e, -el, trinel. [ad. med.L. triennāl-e (sc. officium), neuter of triennālis of three years: cf. F. triennal (16th c.).]
A. adj. = TRIENNIAL. rare–0.
1611. Cotgr., Triennal, triennall, of three yeares.
B. sb. A dispensation or indulgence for three years. (In 14th c. a disyllable = trī·nal.)
1362. Langl., P. Pl., A. VIII. 157. [I] diuinede þat Dowel Indulgence passede, Bienals and Trienals and Busschopes lettres. Ibid., 166. Bote trustene to Trienals [B. VII. 170. triennales; C. X. 330. triennels] treuly me þinkeþ is not so syker for þe soule sertes, as do-wel.
c. 1380. Wyclif, Sel. Wks., III. 400. Biggynge of beneficis, of indulgensis and trinels, pardouns, and veyne privilegies.
