ostentārĭus

I. of or relating to prophetic indications, prophetic (post-class.): ostentaria novitas (al. ostentatoria), Mart. Cap. 2, § 151.—

II. Subst.: ostentārĭum, ii, n., a book of prognostics: Tuscum, Macr. S. 3, 7: arborarium, id. ib. 2, 16.