noun. An arrangement of gears or wheels in a mechanical device.

noun. A combination of wheels, as in watches and clocks, in embroidery, etc.

noun. A combination of wheels, and their connection, in a machine or mechanism.

noun. An assembly of wheels serving a mechanical purpose.

noun. mechanical device including an arrangement of wheel in a machine (especially a train of gears)

"If static our hopes are in vain; if kinetic — and this we know it is, for certain — then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature."

mechanical device  

gear  gearing  geartrain  power train  train