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Pronunciation: ak′shŭn


  1. The performance of any of the vital functions, the manner of such performance, or the result of the same.
  2. The exertion of any force or power, physical, chemical, or mental.

[L. actio, from ago, pp. actus, to do]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.