hyperkinesis

noun

1
: abnormally increased and sometimes uncontrollable activity or muscular movements
2
: a condition especially of childhood characterized by hyperactivity

Examples of hyperkinesis in a Sentence

Recent Examples on the Web
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In the first quarter of the century, it was called hyperkinesis. — Julia Belluz, Vox, 17 Dec. 2018

Word History

Etymology

New Latin

First Known Use

circa 1855, in the meaning defined at sense 1

Time Traveler
The first known use of hyperkinesis was circa 1855

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Cite this Entry

“Hyperkinesis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyperkinesis. Accessed 26 Sep. 2026.

Medical Definition

hyperkinesis

noun
hy·​per·​ki·​ne·​sis -ˈnē-səs How to pronounce hyperkinesis (audio)
1
: abnormally increased and sometimes uncontrollable activity or muscular movements : hyperactivity compare hypokinesia
2
: a condition especially of childhood characterized by hyperactivity

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