01 A wheel which regulates the beats or pulses of a watch or chronometer, answering to the pendulum of a clock; -- often called simply a balance.
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1.
A wheel which regulates the beats or pulses of a watch or chronometer, answering to the pendulum of a clock; -- often called simply a balance.(Horology) Also: balance
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2.
A wheel which imparts regularity to the movements of any engine or machine; a fly wheel.(Mach.)