'Epicycloidal wheel' definitions:

Definition of 'Epicycloidal wheel'

From: GCIDE
  • Epicycloidal \Ep`i*cy*cloid"al\, a. Pertaining to the epicycloid, or having its properties. [1913 Webster]
  • Epicycloidal wheel, a device for producing straight-line motion from circular motion, on the principle that a pin fastened in the periphery of a gear wheel will describe a straight line when the wheel rolls around inside a fixed internal gear of twice its diameter. [1913 Webster]