from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A system of gears in which at least one rotating gear revolves about another.
from the GNU version of the Collaborative International Dictionary of English
- adj. 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis
Sorry, no etymologies found.