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Pronunciation: ā-ki-nē′sē-ă, ā-kī-


  1. Absence or loss of the power of voluntary movement, due to an extrapyramidal disorder.
  2. Obsolete term denoting the postsystolic interval of rest of the heart.
  3. Absence of either inward or outward (dyskinesia) movement of a ventricular region during systole.
  4. A neurosis accompanied by paretic symptoms.

Synonym(s): akinesis

[G. a- priv. + kinēsis, movement]

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