Source : Webster's Revised Unabridged Dictionary (1913)

Epicyclic \Ep`i*cyc"lic\, a.
   Pertaining to, resembling, or having the motion of, an
   epicycle.

   {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.

Source : WordNet®

epicyclic
     adj : of or relating to an epicycle; "epicyclic gear train" [syn:
           {epicyclical}]