Final answer:
Parkinson's disease is an example of an eponym, derived from the name of James Parkinson who first characterized the disease. It is a degenerative brain disorder that causes symptoms like tremor, rigidity, slowness of movement, and postural instability.
Step-by-step explanation:
Parkinson's disease is an example of a(n) eponym. An eponym is a term that is derived from the name of a person, in this case, James Parkinson who first described the disease. Parkinson's disease is a degenerative brain disorder that results in symptoms such as tremor, rigidity, slowness of movement, and postural instability.