1. a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis; [syn: epicyclic train, epicyclic gear train]
WordNet (r) 3.0 (2006):
epicyclic gear train
n 1: a system of epicyclic gears in which at least one wheel
axis itself revolves about another fixed axis [syn:
epicyclic train, epicyclic gear train]