STEP Liddell–Scott–Jones: Βαβυλών

Βαβυλών, -ῶνος, ἡ (בָּבֶל, Heb. form of Assyr. Bab-ili, Gate of God),

Babylon: Mat.1:11, 12 17, Act.7:43" (LXX) ; symbolically, of Rome: Rev.14:8 16:19 17:5 18:2, 10, 21, and prob. also 1Pe.5:13.†

(From Abbott-Smith. LSJ has no entry)