Appendage

The company's subsidiary is considered as an appendage to the main business.

The assistant was a mere appendage to the CEO.

The computer mouse has a small appendage that controls the scrolling function.

The airplane's wing had a small appendage that helped to stabilize the plane in flight.

The bicycle's rear wheel had an appendage for attaching a pannier bag.

She used her prosthetic appendage to walk after losing her leg in an accident.

The lizard's tail is an appendage that it can detach as a defense mechanism.