Longman Dictionary of Contemporary English
differential gear
noun
EXAMPLES FROM CORPUS
▪ It is like the differential gear on the back axle of a car.
Wiktionary
differential gear
n. An arrangement of bevel gears permitting the rotation of two shafts at two different speeds whilst supplying the same torque; used on the rear axles of automobiles to aid cornering.
WordNet
differential gear
n. a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves [syn: differential]
Usage examples of "differential gear".
The reconstructed machine had more than twenty little wheels, a kind of differential gear and a crown wheel.
He suggested I should pass the time seeing the sights while he fixed up the sprockets or the differential gear or whatever it was.