nōmĭnātīvus — Lewis & Short
nōmĭnātīvus, a, um, adj.id.,
I of or belonging to naming, nominative; in gram.:
casus nominativus,the nominative case, Varr. L. L. 10, § 23 Müll.; Quint. 1, 7, 3; 7, 9, 13; 8, 3, 46 et saep.