appendage
ap·pend·age
/əˈpɛndıʤ/ noun , pl -ag·es [ count ]
1 medical : a body part (such as an arm or a leg) connected to the main part of the body : limb
2 : something connected or joined to a larger or more important thing
The court system acts as an appendage to the government.
an appendage of a larger political party
