| NOUN | artifact | power train, gearing, gear, geartrain, train | wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed |
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| Meaning | wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed. | |
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| Synonyms | gearing, gear, geartrain, train | |
| Part of | engine | motor that converts thermal energy to mechanical work |
| Narrower | epicyclic train, epicyclic gear train | A system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis |
| reduction gear | gearing that reduces an input speed to a slower output speed | |
| Broader | wheelwork | mechanical device including an arrangement of wheel in a machine (especially a train of gears) |
| Spanish | cambio, engranaje, marcha, tren | |
| Catalan | dentatge, engranatge, tren | |
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