διποδία
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)
ἡ,
A two-footedness, Arist.PA643a3, Plot.6.3.5. II a Lacedaemonian dance, Cratin.162. III in Metric, combination of two feet, Anon.Oxy. 220 viii 1, Heph.4.3, Aristid.Quint.1.24, etc.