Abbott-Smith Manual Greek Lexicon
συ-στροφή (G4963)
2 συ-στροφή , -ῆς, ἡ ( συστρέφω ), [in LXX: Ho 4:19 13:12 ( צרר ); σ. ποιεῖσθαι , Am 7:10 ( קשׁר ), etc. ;] a twisting together (Plat.). a concourse, a riotous gathering (Polyb.): Ac 19:40 ; σ. ποιεῖσθαι ( Am, l.c. ), to make a compact (RV, banded themselves together ): Ac 23:12 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain