Noun: differential gear
- 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
"The differential gear allows a car's outer wheel to turn faster than the inner wheel when cornering";
- differential
Derived forms: differential gears
Type of: bevel gear, pinion and crown wheel, pinion and ring gear
Encyclopedia: Differential gear