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pendulum
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- Pendulum - n. - A body so suspended from a fixed point as to swing freely to and fro by the alternate action of gravity and momentum. It is used to regulate the movements of clockwork and other machinery.
- Pendulums - pl. - of Pendulum
- Escapement - n. - The contrivance in a timepiece which connects the train of wheel work with the pendulum or balance, giving to the latter the impulse by which it is kept in vibration; -- so called because it allows a tooth to escape from a pallet at each vibration.
- Balance wheel - - 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.
- Pallet - n. - One of the pieces or levers connected with the pendulum of a clock, or the balance of a watch, which receive the immediate impulse of the scape-wheel, or balance wheel.
- Metronome - n. - An instrument consisting of a short pendulum with a sliding weight. It is set in motion by clockwork, and serves to measure time in music.
- Noddy - n. - An inverted pendulum consisting of a short vertical flat spring which supports a rod having a bob at the top; -- used for detecting and measuring slight horizontal vibrations of a body to which it is attached.
- Jigger - n. - A pendulum rolling machine for slicking or graining leather; same as Jack, 4 (i).
- Vibration - n. - The act of vibrating, or the state of being vibrated, or in vibratory motion; quick motion to and fro; oscillation, as of a pendulum or musical string.