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[hahy-per-ki-nee-zhuh, -zhee-uh, -zee-uh, -kahy-] /ˌhaɪ pər kɪˈni ʒə, -ʒi ə, -zi ə, -kaɪ-/

Pathology. an abnormal amount of uncontrolled muscular action; spasm.
Psychiatry. a disorder occurring in children and adolescents, characterized by excessive activity, extreme restlessness, impulsivity, and a short attention span.
/ˌhaɪpəkɪˈniːzɪə; -kaɪ-/
noun (pathol)
excessive movement, as in a muscle spasm
extreme overactivity in children

1880, from hyper- + kinetic. Perhaps immediately from French hyperkinetic (1874). Related: Hyperkinesis.

hyperkinesia hy·per·ki·ne·sia (hī’pər-kə-nē’zhə, -kī-) or hy·per·ki·ne·sis (-sĭs)
Pathologically increased muscular movement.
hy’per·ki·net’ic (-nět’ĭk) adj.


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