a long, narrow, multiple spring composed of several layers of spring metal bracketed together: used in some suspension systems of carriages and automobiles.
Origin
1890-95
Examples from the web for leaf spring
They finished installing the third member gearbox and noticed the rear right leaf spring was loose.
leaf spring hangers are made of either formed high strength steel or cast steel.
British Dictionary definitions for leaf spring
leaf spring
noun
1.
one of a number of metal strips bracketed together in length to form a compound spring