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torsion bar

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noun
  1. a metal bar having elasticity when subjected to torsion: used as a spring in various machines and in automobile suspensions.
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Origin of torsion bar

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for torsion bar

torsion bar

noun
  1. a metal bar acting as a torsional spring, esp as used in the suspensions of some motor vehicles
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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