English

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Etymology

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bi- +‎ ballism

Noun

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biballism (uncountable)

  1. Ballism that affects both sides of the body.
    • 2012, Robert B. Daroff, Gerald M Fenichel, Joseph Jankovic, Neurology in Clinical Practice, →ISBN:
      Ballism is a dramatic proximal ballistic flinging movement (see Chapter 21) that most commonly affects the limbs on one side of the body (hemiballism), but involvement in both legs (paraballism) or both sides of the body (biballism) has been reported.
    • 2017, Deborah A. Hall, Brandon R. Barton, Non-Parkinsonian Movement Disorders, →ISBN, page 55:
      Rarely, it can occur bilaterally (biballism) or affect both legs (paraballism).