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Balance wheel
noun
Definitions
Noun
- 1 The timekeeping device normally used in mechanical watches and small clocks, consisting of a wheel which oscillates due to a coiled spring.
"A mantelpiece clock with rackety balance wheel makes the only sound."
- 2 a wheel that regulates the rate of movement in a machine; especially a wheel oscillating against the hairspring of a timepiece to regulate its beat wordnet
See also for "balance wheel"
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Unscramble this word: balancewheel