WordNet
live axle
n. the axle of a self-propelled vehicle that provides the driving power [syn: driving axle]
Usage examples of "live axle".
Then they were in the S-bend, on cobbles, and he had to brake as he enviously watched the way her de Dion axle married her rear wheels to the rough going, while his own live axle hopped and skittered as he wrenched at the wheel.