vŏcātīvus, a, um, adj. [voco],
of or belonging to calling : casus, the vocative case , in gram., Gell. 14, 5, 1 sq. al.—As subst.: vŏcātīvus , i, m., the vocative case , Charis. p. 11 P.; Prisc. p. 671 ib. al.