Lewis Short
(adjective) : thēsaurārĭus, a, um, thesaurus
* Of or belonging to treasure: fures,treasure-thieves,Plaut. Aul. 2, 8, 25.—Subst.: thēsaurārĭum, i, n., treasure (late Lat.), Cassiod. in Psa. 21, 31.
Charlton T. Lewis, Charles Short, A Latin Dictionary