epicyclic train

noun Machinery.

a train of gears or pulleys in which one or more of the axes revolve about a central axis.

Nearby words

  1. epicureanism,
  2. epicureous,
  3. epicurus,
  4. epicuticle,
  5. epicycle,
  6. epicycloid,
  7. epicycloidal gear,
  8. epicycloidal wheel,
  9. epicystitis,
  10. epicystotomy

Origin of epicyclic train

First recorded in 1885–90

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for epicyclic train

epicyclic train


a cluster of gears consisting of a central gearwheel with external teeth (the sun), a coaxial gearwheel of greater diameter with internal teeth (the annulus), and one or more planetary gears engaging with both of them to provide a large gear ratio in a compact space
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012