ἐφιάλτιον
From LSJ
ἔστιν δέ που ἡ μὲν ἐπὶ σώμασι γυμναστική, ἡ δ' ἐπὶ ψυχῇ μουσική → I think I am right in saying that we have physical exercise for the body and the arts for the soul
English (LSJ)
τό, = δρακοντία μικρά, dragonroot, green dragon, Ps.-Dsc.2.167.
German (Pape)
τό, ein Kraut, das gegen Alpdrücken schützen sollte, Sp.