Epicyclic-train
noun, Machinery.
1.
a train of gears or pulleys in which one or more of the axes revolve about a central axis.
noun
1.
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
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noun 1. one of the gears of an epicyclic train.
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noun 1. one of the planetary gears of an epicyclic train
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