Abbott-Smith Manual Greek Lexicon
ἀπ-ελεγμός (G557)
1 *† ἀπ-ελεγμός , -οῦ, ὁ ( ἀπελέγχω , to convict , refute ), refutation , disrepute : ἐλθεῖν εἰς ἀ. , Ac 19:27 (not elsewhere; v. MM, s.v.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain