anti-sway bar

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a connection between the left and right suspension systems of a road vehicle designed to stabilise it, and reduce roll or sway on corners

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a rigid metal bar between the front suspensions and between the rear suspensions of cars and trucks; serves to stabilize the chassis