perpetual motion


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perpetual motion

n.
The hypothetical continuous operation of an isolated mechanical device or other closed system without a sustaining energy source.

perpetual motion

n
1. Also called: perpetual motion of the first kind motion of a hypothetical mechanism that continues indefinitely without any external source of energy. It is impossible in practice because of friction
2. Also called: perpetual motion of the second kind motion of a hypothetical mechanism that derives its energy from a source at a lower temperature. It is impossible in practice because of the second law of thermodynamics

perpet′ual mo′tion


n.
the motion of a theoretical mechanism that, without any losses due to friction or other forms of dissipation of energy, would continue to operate indefinitely at the same rate without any external energy being applied to it.
[1585–95]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.perpetual motion - motion that continues indefinitely without any external source of energyperpetual motion - motion that continues indefinitely without any external source of energy; impossible in practice because of friction
motion - a state of change; "they were in a state of steady motion"
References in classic literature ?
There have been eccentric inventors, starving their families while they sought such chimeras as perpetual motion.
Folks do say that you are trying to discover the perpetual motion.
I was afraid your perpetual motion had bewitched you out of the remembrance of old times.
The discovery of this Behoving Machine was the discovery of the political perpetual motion.
There was not the slightest necessity for the greater portion of the labour performed by the old lady: but she seemed to work from some irresistible impulse; her limbs continually swaying to and fro, as if there were some indefatigable engine concealed within her body which kept her in perpetual motion.
The have-his-carcass, next to the perpetual motion, is vun of the blessedest things as wos ever made.
I can no more tell you the whys and wherefores of myself than I can lift myself up by the waistband and carry myself into the next county, as some one challenged a speculator in perpetual motion to do.
It is the nearest thing to perpetual motion, the only respite being Christmas Day.
6 Perpetual motion as Thistle got in Celtic's faces but went unrewarded.
More typically, parents describe a lower-grade stress that stems, first, from the nearly perpetual motion required simply to fill the basic needs of more than two babies at once.
Sankai Juku's new work, Yuragi: In a Space of Perpetual Motion, is shimmering and luminous, a vision of sensuous delight that makes it hard to recall the shock of the group's first performances in this country some ten years ago.
com) and Perpetual Motion Fitness Corporation (PMFC) where he oversees the realization of his dream - the fusion of technology, travel, and a healthy lifestyle.

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