gearbox
/ˈɡɪrˌbɑks/
noun
- A metal case that contains the gears of a vehicle or machine, especially the part of a car that changes the speed of the wheels.
- The factory uses a heavy-duty gearbox to control the speed of the conveyor belt.
- My dad's old truck has a manual gearbox that makes a loud whining noise in third gear.
- The mechanic had to remove the entire gearbox to fix the broken gear.
Synonyms