mechanism:
noun
1.
an assembly of moving parts performing a complete functional motion,
often being part of a large machine; linkage.
2.
the agency or means by which an effect is produced or a purpose is
accomplished.
3.
machinery or mechanical appliances in general.
4.
the structure or arrangement of parts of a machine or similar device,
or of anything analogous.
5.
the mechanical part of something; any mechanical device:
the mechanism of a clock.
6.
routine methods or procedures; mechanics:
the mechanism of government.
7.
mechanical execution, as in painting or music; technique.