Definition of pendulum in English:

pendulum

noun ˈpɛndjʊləmˈpɛndʒələm

1A weight hung from a fixed point so that it can swing freely, especially a rod with a weight at the end that regulates the mechanism of a clock.
摆；钟摆
Example sentencesExamples
- The ticking of a clock filtered through the silence, a pendulum swinging lightly on the side of the dimly lit room which was basked in a dull, blue light.
- The pendulum of the grandfather clock sways as the second hand moves seemingly unbearably slow.
- He used the involute of a circle in his first pendulum clock in an attempt to force the pendulum to swing in the path of a cycloid.
- But somewhere in the middle of the pendulums swing, individuals who are tenacious, perceptive, or lucky may glean both freedom and wisdom from social changes.
- Two girls sat on opposite bunk beds, both on the top letting their legs dangle over the sides and swinging their feet like fast swinging pendulums.
- Until the 1920s, the most accurate timepieces depended on the regular swing of a pendulum.
- Two sensors help keep the clock accurate by checking the swing of the pendulum using the lights that power it.
- With his interest in the measurement of time, he then discovered the pendulum could be a regulator of clocks.
- Passion results when they collide, swing apart, and collide once again, as long as the pendulums don't swing apart so violently that their connection breaks and they fly off in opposite directions.
- Now suppose that the pendulums of the two clocks were arrested.
- In contrast, when the pendulums swing in opposite directions at the same frequency, the platform doesn't move.
- If I then release the weight the pendulum begins to swing.
- This dislodged the pendulum, causing the clock to strike the twelfth time.
- The early pendulum clocks had short pendulums.
- You see, all mechanical clocks are driven by a weight, like a pendulum, or a tightly wound spring.
- It's the same phenomenon that causes swinging pendulums to synchronize when they are close together, or that causes a tuning fork to vibrate sympathetically when another tuning fork of the same pitch is struck.
- He constructed the first pendulum clock with a device to ensure that the pendulum was isochronous by forcing the pendulum to swing in a cycloid arc.
- It was hot, sticky day in the French capital and the match began with the stately tempo of a grandfather clock's pendulum.
- This motion can be described in terms of a differential equation, and in the case of small swings of the pendulum this equation can be solved to find the time of the swing.
- There is some evidence that the pendulum is swinging in that direction.
1. 1.1 Used to refer to the tendency of a situation to oscillate between one extreme and another.
  〈喻〉摇摆不定的事态（或局面）
  the pendulum of fashion
  变幻莫测的流行式样。
  Example sentencesExamples
  Sometimes the pendulum is at one extreme or another as the result of the push of forces for change.
  Although he wrongly concluded that the periods of oscillation of two pendulums were in the same ratio as their lengths, he later corrected the error.
  You can see how the pendulum between these two extremes has swung by looking at e-mail.
  Those are the days when the cycling mental pendulum is at its polar extremes.
  This must put him near the low point in the pendulum of architectural fashion.

The use of the pendulum for regulating clocks depends on the principle, discovered by Galileo c.1602, that for small amplitudes the time of oscillation of a pendulum depends only on its length. A freely suspended pendulum resists changes in its plane of oscillation, a fact employed by Jean Foucault in 1851 to demonstrate the earth's rotation

Derivatives

pendular

adjective ˈpɛndjʊləˈpɛndʒələr

1Moving or swinging back and forth in a regular rhythm like a pendulum.
passengers quickly adapt to the pendular swaying motion
1. 1.1 Hung from a fixed point like a pedulum.
Example sentencesExamples
- My feeling is that the moment of inertia and pendular stability is sufficient to retard the pitch change from a single surface deflection.
- Most west European tower bells are chimed at their natural pendular speed; small bells, therefore, sound in faster succession than large bells.
- A third pattern of contractions, called pendular movements, manifests itself as swaying motions seen in isolated loops of intestine, probably reflecting rhythmic contractions confined to the longitudinal layer of muscle.
- pendular earrings

Origin

Mid 17th century: from Latin, neuter (used as a noun) of pendulus 'hanging down'.

Definition of pendulum in US English:

pendulum

nounˈpenjələmˈpɛndʒələm

1A weight hung from a fixed point so that it can swing freely backward and forward, especially a rod with a weight at the end that regulates the mechanism of a clock.
摆；钟摆
Example sentencesExamples
- Passion results when they collide, swing apart, and collide once again, as long as the pendulums don't swing apart so violently that their connection breaks and they fly off in opposite directions.
- The early pendulum clocks had short pendulums.
- He constructed the first pendulum clock with a device to ensure that the pendulum was isochronous by forcing the pendulum to swing in a cycloid arc.
- Two girls sat on opposite bunk beds, both on the top letting their legs dangle over the sides and swinging their feet like fast swinging pendulums.
- It was hot, sticky day in the French capital and the match began with the stately tempo of a grandfather clock's pendulum.
- The pendulum of the grandfather clock sways as the second hand moves seemingly unbearably slow.
- Until the 1920s, the most accurate timepieces depended on the regular swing of a pendulum.
- The ticking of a clock filtered through the silence, a pendulum swinging lightly on the side of the dimly lit room which was basked in a dull, blue light.
- With his interest in the measurement of time, he then discovered the pendulum could be a regulator of clocks.
- You see, all mechanical clocks are driven by a weight, like a pendulum, or a tightly wound spring.
- There is some evidence that the pendulum is swinging in that direction.
- But somewhere in the middle of the pendulums swing, individuals who are tenacious, perceptive, or lucky may glean both freedom and wisdom from social changes.
- Two sensors help keep the clock accurate by checking the swing of the pendulum using the lights that power it.
- He used the involute of a circle in his first pendulum clock in an attempt to force the pendulum to swing in the path of a cycloid.
- This dislodged the pendulum, causing the clock to strike the twelfth time.
- It's the same phenomenon that causes swinging pendulums to synchronize when they are close together, or that causes a tuning fork to vibrate sympathetically when another tuning fork of the same pitch is struck.
- Now suppose that the pendulums of the two clocks were arrested.
- If I then release the weight the pendulum begins to swing.
- This motion can be described in terms of a differential equation, and in the case of small swings of the pendulum this equation can be solved to find the time of the swing.
- In contrast, when the pendulums swing in opposite directions at the same frequency, the platform doesn't move.
1. 1.1 Used to refer to the tendency of a situation to oscillate between one extreme and another.
  〈喻〉摇摆不定的事态（或局面）
  the pendulum of fashion
  变幻莫测的流行式样。
  Example sentencesExamples
  Those are the days when the cycling mental pendulum is at its polar extremes.
  You can see how the pendulum between these two extremes has swung by looking at e-mail.
  This must put him near the low point in the pendulum of architectural fashion.
  Although he wrongly concluded that the periods of oscillation of two pendulums were in the same ratio as their lengths, he later corrected the error.
  Sometimes the pendulum is at one extreme or another as the result of the push of forces for change.

Origin

Mid 17th century: from Latin, neuter (used as a noun) of pendulus ‘hanging down’.

词汇	pendulum
释义	Definition of pendulum in English: pendulum noun ˈpɛndjʊləmˈpɛndʒələm 1A weight hung from a fixed point so that it can swing freely, especially a rod with a weight at the end that regulates the mechanism of a clock. 摆；钟摆 Example sentencesExamples The ticking of a clock filtered through the silence, a pendulum swinging lightly on the side of the dimly lit room which was basked in a dull, blue light. The pendulum of the grandfather clock sways as the second hand moves seemingly unbearably slow. He used the involute of a circle in his first pendulum clock in an attempt to force the pendulum to swing in the path of a cycloid. But somewhere in the middle of the pendulums swing, individuals who are tenacious, perceptive, or lucky may glean both freedom and wisdom from social changes. Two girls sat on opposite bunk beds, both on the top letting their legs dangle over the sides and swinging their feet like fast swinging pendulums. Until the 1920s, the most accurate timepieces depended on the regular swing of a pendulum. Two sensors help keep the clock accurate by checking the swing of the pendulum using the lights that power it. With his interest in the measurement of time, he then discovered the pendulum could be a regulator of clocks. Passion results when they collide, swing apart, and collide once again, as long as the pendulums don't swing apart so violently that their connection breaks and they fly off in opposite directions. Now suppose that the pendulums of the two clocks were arrested. In contrast, when the pendulums swing in opposite directions at the same frequency, the platform doesn't move. If I then release the weight the pendulum begins to swing. This dislodged the pendulum, causing the clock to strike the twelfth time. The early pendulum clocks had short pendulums. You see, all mechanical clocks are driven by a weight, like a pendulum, or a tightly wound spring. It's the same phenomenon that causes swinging pendulums to synchronize when they are close together, or that causes a tuning fork to vibrate sympathetically when another tuning fork of the same pitch is struck. He constructed the first pendulum clock with a device to ensure that the pendulum was isochronous by forcing the pendulum to swing in a cycloid arc. It was hot, sticky day in the French capital and the match began with the stately tempo of a grandfather clock's pendulum. This motion can be described in terms of a differential equation, and in the case of small swings of the pendulum this equation can be solved to find the time of the swing. There is some evidence that the pendulum is swinging in that direction. 1.1 Used to refer to the tendency of a situation to oscillate between one extreme and another. 〈喻〉摇摆不定的事态（或局面） the pendulum of fashion 变幻莫测的流行式样。 Example sentencesExamples Sometimes the pendulum is at one extreme or another as the result of the push of forces for change. Although he wrongly concluded that the periods of oscillation of two pendulums were in the same ratio as their lengths, he later corrected the error. You can see how the pendulum between these two extremes has swung by looking at e-mail. Those are the days when the cycling mental pendulum is at its polar extremes. This must put him near the low point in the pendulum of architectural fashion. The use of the pendulum for regulating clocks depends on the principle, discovered by Galileo c.1602, that for small amplitudes the time of oscillation of a pendulum depends only on its length. A freely suspended pendulum resists changes in its plane of oscillation, a fact employed by Jean Foucault in 1851 to demonstrate the earth's rotation Derivatives pendular adjective ˈpɛndjʊləˈpɛndʒələr 1Moving or swinging back and forth in a regular rhythm like a pendulum. passengers quickly adapt to the pendular swaying motion 1.1 Hung from a fixed point like a pedulum. Example sentencesExamples My feeling is that the moment of inertia and pendular stability is sufficient to retard the pitch change from a single surface deflection. Most west European tower bells are chimed at their natural pendular speed; small bells, therefore, sound in faster succession than large bells. A third pattern of contractions, called pendular movements, manifests itself as swaying motions seen in isolated loops of intestine, probably reflecting rhythmic contractions confined to the longitudinal layer of muscle. pendular earrings Origin Mid 17th century: from Latin, neuter (used as a noun) of pendulus 'hanging down'. Definition of pendulum in US English: pendulum nounˈpenjələmˈpɛndʒələm 1A weight hung from a fixed point so that it can swing freely backward and forward, especially a rod with a weight at the end that regulates the mechanism of a clock. 摆；钟摆 Example sentencesExamples Passion results when they collide, swing apart, and collide once again, as long as the pendulums don't swing apart so violently that their connection breaks and they fly off in opposite directions. The early pendulum clocks had short pendulums. He constructed the first pendulum clock with a device to ensure that the pendulum was isochronous by forcing the pendulum to swing in a cycloid arc. Two girls sat on opposite bunk beds, both on the top letting their legs dangle over the sides and swinging their feet like fast swinging pendulums. It was hot, sticky day in the French capital and the match began with the stately tempo of a grandfather clock's pendulum. The pendulum of the grandfather clock sways as the second hand moves seemingly unbearably slow. Until the 1920s, the most accurate timepieces depended on the regular swing of a pendulum. The ticking of a clock filtered through the silence, a pendulum swinging lightly on the side of the dimly lit room which was basked in a dull, blue light. With his interest in the measurement of time, he then discovered the pendulum could be a regulator of clocks. You see, all mechanical clocks are driven by a weight, like a pendulum, or a tightly wound spring. There is some evidence that the pendulum is swinging in that direction. But somewhere in the middle of the pendulums swing, individuals who are tenacious, perceptive, or lucky may glean both freedom and wisdom from social changes. Two sensors help keep the clock accurate by checking the swing of the pendulum using the lights that power it. He used the involute of a circle in his first pendulum clock in an attempt to force the pendulum to swing in the path of a cycloid. This dislodged the pendulum, causing the clock to strike the twelfth time. It's the same phenomenon that causes swinging pendulums to synchronize when they are close together, or that causes a tuning fork to vibrate sympathetically when another tuning fork of the same pitch is struck. Now suppose that the pendulums of the two clocks were arrested. If I then release the weight the pendulum begins to swing. This motion can be described in terms of a differential equation, and in the case of small swings of the pendulum this equation can be solved to find the time of the swing. In contrast, when the pendulums swing in opposite directions at the same frequency, the platform doesn't move. 1.1 Used to refer to the tendency of a situation to oscillate between one extreme and another. 〈喻〉摇摆不定的事态（或局面） the pendulum of fashion 变幻莫测的流行式样。 Example sentencesExamples Those are the days when the cycling mental pendulum is at its polar extremes. You can see how the pendulum between these two extremes has swung by looking at e-mail. This must put him near the low point in the pendulum of architectural fashion. Although he wrongly concluded that the periods of oscillation of two pendulums were in the same ratio as their lengths, he later corrected the error. Sometimes the pendulum is at one extreme or another as the result of the push of forces for change. Origin Mid 17th century: from Latin, neuter (used as a noun) of pendulus ‘hanging down’.
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