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Pronunciation: re-duk'shun


  1. The restoration, by surgical or manipulative procedures, of a part to its normal anatomic relation.
  2. In chemistry, a reaction involving a gain of one or more electrons by a substance, such as when iron passes from the ferric (3+) to the ferrous (2+) state, or when hydrogen is added to the double bond of an organic compound, or when an aldehyde is converted to an alcohol.

Synonym(s): repositioning2

[L. reductio, fr. re-duco, pp. ductus, to lead back]

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