προέλασις
From LSJ
αἰθὴρ δ᾽ ἐλαφραῖς πτερύγων ῥιπαῖς ὑποσυρίζει (Aeschylus, Prometheus Bound 126) → The bright air fanned | whistles and shrills with rapid beat of wings.
English (LSJ)
εως, ἡ,
A riding forward: cavalry charge, X.Eq.Mag.8.3 (pl.).
German (Pape)
[Seite 719] ἡ, das Vorreiten, Vorrücken, Xen. Hipparch. 8, 3.