Parkinson's disease
noun
Par·kin·son's disease ˈpär-kən-sənz- 
variants or less commonly Parkinson disease or Parkinson's or Parkinson's syndrome
: a chronic progressive neurological disease chiefly of later life that is linked to decreased dopamine production in the substantia nigra and is marked especially by tremor of resting muscles, rigidity, slowness of movement, impaired balance, and a shuffling gait
called also paralysis agitans
Word History
Etymology
James Parkinson †1824 English physician
First Known Use
1877, in the meaning defined above
Medical Definition
Parkinson's disease
noun
Par·kin·son's disease ˈpär-kən-sənz-
variants also Parkinson disease or Parkinson's
-sən-
: a chronic progressive neurological disease chiefly of later life that is linked to decreased dopamine production in the substantia nigra, is of unknown cause, and is marked especially by tremor of resting muscles, rigidity, slowness of movement, impaired balance, and a shuffling gait
called also paralysis agitans, parkinsonian syndrome, parkinsonism, Parkinson's syndrome