Abbott-Smith Manual Greek Lexicon
ἀντίδικος (G476)
5 ἀντίδικος , -ον ( δίκη ), [in LXX for רִיב ;] as subst., an opponent in a lawsuit , adversary : Mt 5:25 , Lk 12:58 18:3 , I Pe 5:8 (Cremer, 696; MM, VGT , s.v.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain