flywheel
SayFLY-weel/ˈflaɪˌwil/UK/ˈflaɪˌwiːl/
Pluralflywheels
- 1A heavy spinning wheel that helps a machine keep a steady speed and can store energy.
Like a spinning top that keeps turning on its own for a while after you let go.
The engine has a heavy flywheel that keeps it turning smoothly.
A flywheel stores energy and gives it back when the machine needs more.
Note
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Origin
It comes from the words "fly" and "wheel" joined together.