ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  perpetual motion machine - a machine that can continue to do work indefinitely without drawing energy from some external source; impossible under the law of conservation of energymachine - any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks |
How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
| ?Page tools | ||
|---|---|---|
|