noun
differential
A gear mechanism that allows driven wheels to turn at different speeds.
The differential lets the driven wheels turn at different speeds.
Etymology
Latin dis- and ferre connect the word with difference. The gear assembly is named for the differing wheel speeds it permits while transmitting drive to both wheels.
More examples
- The mechanic checks the rear differential for an oil leak.
- A locking differential helps the truck maintain traction on rough ground.
- Both differentials need fresh oil before the long trip.
Forms
differential · differentials
Similar words
- diff
- An informal shortened name for the same vehicle mechanism.
- differential gear
- A fuller technical name for the same wheel-speed mechanism.