geartrain

WORDNET DICTIONARY

geartrain(n = noun.artifact) gear, gearing, power train, train - wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed; "the fool got his tie caught in the geartrain"

is a part of engine

has particulars: epicyclic gear train, epicyclic train, reduction gear

is a kind of wheelwork

geartrain, n.

a connected set of rotating gears by which force is transmitted or motion or torque is changed. [WordNet 1.5]

For further exploring for "geartrain" in Webster Dictionary Online