noun

flywheel

flywheel

The engine's flywheel stores rotational energy.

The engine's flywheel stores rotational energy.

a/the ((flywheel)) used as a countable noun The flywheel needs to be replaced.

Synonyms: balance wheel, inertial wheel

A compound word from 'fly' + 'wheel'. A wheel that seems to 'fly' due to its speed, storing momentum.

Think of a heavy 'wheel' that keeps spinning ('flying') once you get it started.

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