sway bar

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. See anti-sway bar.

Wiktionary

1. n. An anti-sway bar.

GNU Webster's 1913

1. A bar attached to the hounds, in the rear of the front axle, so as to slide on the reach as the axle is swung in turning the vehicle.
2. Either of the two bars used on couplong the oront ano rear sleds of a logging sled; also, the bar used to couple two logging cars.