A.loop attached to the yoke (ζυγόν), through which the beasts' heads were put, “χαίτη ζεύγλης ἐξεριποῦσα παρὰ ζυγόν” Il.17.440; “ἔζευξα . . ἐν ζυγοῖσι κνώδαλα ζεύγλαισι δουλεύοντα” A.Pr.463; ὑποδύντες ὑπὸ τὴν ζ. Hdt.1.31; “βόας ζεύγλᾳ πέλασσεν” Pi.P.4.227; ὑπάγειν τοὺς ἵππους τῇ ζ. Luc.DMar.6.2.
II. cross-bar of the double rudder, E.Hel.1536.