ostentārĭus, a, um, adj. [ostentum],
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.