A cry by which one chides a mule, (IDrd, S, IKtt, * O, K,) to urge him: (IKtt:) sometimes, by poetic license, it is made decl.: (L, TA:) the vulgar say عد [apparently عَدْ]. (TA.)
2.
Hence, (TA,) sometimes, (S, O,) it is also used as a name for The mule; (S, O, K;) like as the ass is [sometimes] called سَأْ سَأْ, which is [origiginally] a cry whereby one chides an ass; and there are other instances of the same kind. (TA.)