torsion bar definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a metal bar exhibiting resilience under torsion; specif., one used in place of a coil spring in the suspension of some motor vehicles
torsion bar definition by American Heritage Dictionary
A part of an automotive suspension consisting of a bar that twists to maintain stability.