Wiktionary
gearwork
n. A mechanical assembly of gears.
Usage examples of "gearwork".
This heavenly machinery, like the gearwork of a great clock, turned day to night and back to day again.
With a grumble and crunch like dying gearworks, it retreated back toward its wires, sucking itself back within them, like an octopus into its hole.
Soon matters turned to steam engines and gas turbines, and rockmilk, and the gearwork of a harness, and bits and bridles the size of ships.