Definition of athetosis in English:

athetosis

noun

Medicine
  • [mass noun] A condition in which abnormal muscle contraction causes involuntary writhing movements. It affects some people with cerebral palsy, impairing speech and use of the hands.

    • ‘Because of increased physical activity through involuntary movements, non-ambulatory children with athetosis are hyperactive and may have increased energy expenditure.’

Origin

Late 19th century: from Greek athetos without position + -osis.

Pronunciation

athetosis

/ˌaθɪˈtəʊsɪs/