epiredium

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

ĕpĭrēdĭum, ii, 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.