καταβαθμός

A. descent, a name of the steep slope which separates Egypt and Nubia, and causes the Cataracts, A. Pr. 811 (in Att. form Καταβασμός), Plb. 31.18.9, Str. 17.1.5, Abh.Berl.Akad. 1925(5).6 (Cyrene).