Pronunciation: ' pär-k ə n-s ə nz-
Function: noun
Etymology: James Parkinson † 1824 English physician
Date: 1877
: 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 Parkinson's Parkinson's syndrome