Lewis Short
(adjective) : trīdŭānus, a, um, triduum
* Lasting three days, of three days' continuance (post-class.): spectaculum,App. M. 10, p. 247, 27: jejunia,Hier. Ep. 54, 10: funus,Paul. Nol. Carm. 12, 207.
Charlton T. Lewis, Charles Short, A Latin Dictionary