noun

• (neurology, pathology) A neurological syndrome characterized by tremor, bradykinesia, rigidity, and postural instability; a condition with the symptoms of Parkinson's disease, regardless of its cause.
• Alternative letter-case form of parkinsonism. [(neurology, pathology) A neurological syndrome characterized by tremor, bradykinesia, rigidity, and postural instability; a condition with the symptoms of Parkinson's disease, regardless of its cause.]