καταβίβασις
From LSJ
τὸ ἐγδοχῖον τοῦ ὕδατος καὶ τὰ ἐν τῆι πόλει ὑδραγώγια → the water reservoir and the conduits in the city (or on the acropolis)
English (LSJ)
-εως, ἡ, = καταβιβασμός, EM 610.24.
German (Pape)
[Seite 1340] ἡ, = Folgdm, E. M. 610, 24, vom Accente.