ἔκδῐκ-ος · ekdik-os — LSJ
lawless, unjust, ἔκδικα πάσχω A. Pr. 1093 (anap.); of persons, S. OC 920, Ael. NA 16.5 (Sup.). Adv. -κως A. Pr. 976, etc.
maintaining the right, avenging, ἔχει θεὸς ἔ. ὄμμα Batr. 97; ἔ. χρόνος AP 12.35 (Diocl.), cf. LXX Wi. 12.12.
Subst., avenger, Hdn. 7.4.5; αἱ Ἰβύκου ἔ. Plu. Garr. 2.509f.
public advocate or prosecutor, IG 9(1).61, Cic. Fam. 13.56.1, Michel 459 (Telmessus), BMus.Inscr. 481*.315 (Ephesus, ii A.D.).
generally, legal representative, POxy. 261.14 (i A.D.), Plin. Ep.Traj. 110, etc.