Definition that contains epicyclic train
- sun gear the central gear in an epicyclic train
- planet gear an outer gear that revolves about a central sun gear of an epicyclic train
- planet wheel an outer gear that revolves about a central sun gear of an epicyclic train
- planetary gear an outer gear that revolves about a central sun gear of an epicyclic train
- epicyclic gear an outer gear that revolves about a central sun gear of an epicyclic train