Lewis Short
ĕpĭrēdĭum (noun N) : ἐπί-reda; perh. derived immediately from the Greeks, who adopted the Gallic reda into their language
* A thong by which a horse was attached to a cart, Juv. 8, 66; Quint. 1, 5, 68.
Charlton T. Lewis, Charles Short, A Latin Dictionary