ἱππούραιον
From LSJ
τίς δ' οἶδεν εἰ τὸ ζῆν μέν ἐστι κατθανεῖν, τὸ κατθανεῖν δὲ ζῆν κάτω νομίζεται → who knows if life is death, and if in the underworld death is considered life
English (LSJ)
τό,= ἵππουρος, A horse-tail, Arat.438.
German (Pape)
[Seite 1261] τό, = ἵππουρις, bei Arat. 438 der Pferdeschweif.