A.which draws by the trace only (being harnessed by the side of the pair under the yoke, οἱζύγιοι), trace-horse: hence metaph., sts. yoke-mate, coadjutor, A.Ag.842; sts. one who has light work, ib.1640, cf. Ar.Nu.1300; ς. [κάμηλος] attached like a trace-horse, Hdt.3.102.