noun
an outer gear that revolves about a central sun gear of an epicyclic train
• Syn: ↑epicyclic gear, ↑planet wheel, ↑planet gear
• Hypernyms: ↑gear, ↑gear wheel, ↑geared wheel, ↑cogwheel
• Part Holonyms: ↑epicyclic train, ↑epicyclic gear train
Useful english dictionary. 2012.