GNU Collaborative International Dictionary of English

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1.       
   epicyclic, epicyclical , a. Pertaining to, resembling, or having the motion of, an epicycle.
   1913 Webster
   Epicyclic train (Mach.), a train of mechanism in which epicyclic motion is involved; esp., a train of spur wheels, bevel wheels, or belt pulleys, in which an arm, carrying one or more of the wheels, sweeps around a center lying in an axis common to the other wheels.
   1913 Webster