accusatival,a.|əˌkjuːzəˈtaɪvəl| [f. L. accūsātīv-um + -al1.] Pertaining to the accusative case. 1874Sayce Comp.Philol. vii. 289 The so-called genitive termination in i, which the second substantive takes in Assyrian, is but a modification of the accusatival -a.