'epicyclical' definitions:

Definition of 'epicyclical'

(from WordNet)
adjective
Of or relating to an epicycle; "epicyclic gear train" [syn: epicyclic, epicyclical]

Definition of 'epicyclical'

From: GCIDE
  • epicyclic \ep`i*cyc"lic\, epicyclical \ep`i*cyc"lic*al\, 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]