Epicyclic
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Pertaining to, resembling, or having the motion of, anepicycle. Epicyclic train (Mach.), a train of mechanism in whichepicyclic motion is involved; esp., a train of spur wheels, bevelwheels, or belt pulleys, in which an arm, carrying one or more of thewheels, sweeps around a center lying in an axis common to the otherwheels.
Epicyclic meaning & definition 1 of Epicyclic.