clockwork

English Thesaurus

1. any mechanism of geared wheels that is driven by a coiled spring; resembles the works of a mechanical clock (noun.artifact)

hypernym	:	mechanism,
definition	:	device consisting of a piece of machinery; has moving parts that perform some function (noun.artifact)

part holonym	:	mainspring,
definition	:	the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism (noun.artifact)