epicyclic train(n = noun.artifact) epicyclic gear train - a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis;
is a kind of gear, gearing, geartrain, power train, train
has parts: epicyclic gear, planet gear, planet wheel, planetary gear, sun gear

battering train, boat train, bullet train, car train, commuter train, corridor train, epicyclic, epicyclic gear, epicyclic gear train, express train, freight train, gravy train, hospital train, liner train, mail train, passenger train, power train, railroad train, subway train, train, train depot, train dispatcher, train fare, train of thought, train oil, train set, train station, train ticket, vestibuled train, wagon train, wave train