pĕrendĭnus — Lewis & Short
pĕrendĭnus, a, um, adj.perendie,
I after to-morrow (class.):
tot homines tam ingeniosos, per tot annos statuere non potuisse, utrum diem tertium, an perendinum dici oporteret,Cic. Mur. 12, 27:
perendino die,Caes. B. G. 5, 30.—Absol. (anteand post-class.):
tu in perendinum paratus sis,against the day after to-morrow, Plaut. Trin. 5, 2, 65:
dies perendini,Gell. 10, 24, 9.