[ak-uh-thizh-uh, -thiz-ee-uh]
a state of motor restlessness, sometimes produced by neuroleptic medication, that ranges from a feeling of inner distress to an inability to sit still.

1900–05; < Czech akathisie < Greek a- a-6 + káthis(is) sitting (noun derivative of kathízein to seat, make sit, take one's seat; kat- cat- + hízein to seat, akin to sit1) + Neo-Latin -ia -ia

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World English Dictionary
akathisia (ˌækəˈθiːzɪə)
the inability to sit still because of uncontrollable movement caused by reaction to drugs
[C20: from a- + -kithisia, ultimately from Greek cathedra seat]

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American Heritage
Medical Dictionary

akathisia ak·a·this·i·a or ac·a·this·i·a (āk'ə-thĭz'ē-ə)

  1. Motor restlessness characterized by muscular quivering and the inability to sit still, often a result of chronic ingestion of neuroleptic drugs.

  2. Intense anxiety at the thought of sitting down; inability to sit down.

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Example sentences
Akathisia is a movement disorder that is often a side effect of certain psychiatric drugs.
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