epicyclic gear train
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|Noun||1.||epicyclic gear train - a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis|
gearing, geartrain, power train, gear, train - wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed; "the fool got his tie caught in the geartrain"
epicyclic gear, planet gear, planet wheel, planetary gear - an outer gear that revolves about a central sun gear of an epicyclic train
sun gear - the central gear in an epicyclic train
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