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Pronunciation: kon-trak'shun


  1. A shortening or increase in tension; denoting the normal function of muscle.
  2. Shrinkage or reduction in size.
  3. Heart beat, as in premature contraction.

[L. contractus, drawn together]

Further information

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