a metal bar having elasticity when subjected to torsion: used as a spring in various machines and in automobile suspensions.
Origin of torsion bar
First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for torsion bar
a metal bar acting as a torsional spring, esp as used in the suspensions of some motor vehicles
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012