perpetual-motion machine

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A machine that could run forever. A perpetual-motion machine would have to produce at least as much energy as was needed for its operation. According to the second law of thermodynamics, such a machine is impossible, and to date none has ever been successfully demonstrated.

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His boss, whom he admires, is waiting to meet with him about the big project.

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Words nearby perpetual-motion machine

perpetual check, perpetual debenture, perpetual inventory, perpetually, perpetual motion, perpetual-motion machine, perpetuate, perpetuated, perpetuation, perpetuity, perphenazine

How to use perpetual-motion machine in a sentence

I think Ill work on that, instead of my perpetual motion machine after the games.
For the Honor of Randall|Lester Chadwick
How did you become interested in this perpetual motion machine, Miss Laidlaw?
The Social Gangster|Arthur B. Reeve
The mutual motion in coition was one of the reasons for Gilbert's rejection of the perpetual motion machine of Peregrinus.
The Natural Philosophy of William Gilbert and His Predecessors|W. James King
This is what a perpetual-motion machine would be if such a machine were possible.
The Story of Great Inventions|Elmer Ellsworth Burns

On a Perpetual Motion Machine, mentioned by authors, by means of the attraction of a loadstone.
On the magnet, magnetick bodies also, and on the great magnet the earth|William Gilbert of Colchester