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Perpetual motion machine
Noun
Definitions
1.
Noun
A hypothetical, pseudoscientific device that exhibits perpetual motion, especially one that does useful work with no input of energy.
Synonyms
perpetual motion
brownian ratchet
simple pendulum
quantity of motion
permanent magnet
aetherometry
pseudomomentum
pseudogravity
momentum
permanent wave
gyromotion
impetus
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