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ballism

[bal-iz-uh m]
noun Pathology.
  1. a condition characterized by twisting, shaking, and jerking motions.
  2. Parkinson's disease.
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Also bal·lis·mus [ba-liz-muh s] /bæˈlɪz məs/.

Origin of ballism

1955–60; < New Latin ballismus < Greek ballismós a jumping around, dancing, equivalent to báll(ein) to throw + -ismos -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018