1. Restoration of the lytic activity of an inactivated serum by means of the addition of complement. 2. Restoration of activity in an inactivated enzyme.
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re·ac·ti·va·tion -.ak-tə-'vā-shən n the act or process of reactivating or condition of being reactivated
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re·ac·ti·va·tion (re-ak″tĭ-vaґshən) the restoration of activity to something that has been inactivated.Medical dictionary. 2011.