power_train
1. [ noun ] (physics) wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed
Synonyms: gears geartrain train gearing
Examples:

"the fool got his tie caught in the geartrain"

Related terms: wheelwork epicyclic_train reduction_gear engine
Similar spelling:   power_trip
  power-driven
  portrait
  power_drill