Lewis & Short

accūsātōrĭus, a, um, adj. [accusator], pertaining to an accuser, accusatory: lex, Cic. Mur. 5: jus et mos, id. Flacc. 6, 14; artificium, id. Rosc. Am. 17, 49: animus, id. Clu. 4, 11: vox, Liv. 45, 10: spiritus, id. 2, 61: vita, Quint. 12, 7, 3: libelli, Dig. 48, 5, 17, § 1 al.
Adv.: accūsātōrĭe, in the manner of an accuser, Cic. Verr. 2, 2, 72, § 176; 2, 3, 70, § 164; Liv. 40, 12, 6.