perpetual motion machine
Noun
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Noun
perpetual motion machine (plural perpetual motion machines)
- (physics, pseudoscience) A hypothetical, pseudoscientific device that exhibits perpetual motion, especially one that does useful work with no input of energy.
- German: Perpetuum mobile
This text is extracted from the Wiktionary and it is available under the CC BY-SA 3.0 license | Terms and conditions | Privacy policy 0.004