| whiffletree | (n) a crossbar that is attached to the traces of a draft horse and to the vehicle or implement that the horse is pulling, Syn. swingletree, whippletree |
| Swingletree | n. [ So named in allusion to its swinging. See Swingle, v. i., and cf. Swingtree. ] A whiffletree, or whippletree. See Singletree. [ 1913 Webster ] |