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n.
the process of washing out a wound or hollow organ with a continuous flow of water or medicated solution. Techniques are available for washing out the entire intestinal tract (whole-gut irrigation) as a prelude to surgery on the lower intestine.
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ir·ri·ga·tion (ir″ĭ-gaґshən) [L. irrigatio] 1. washing by a stream of water or other fluid; see also lavage. 2. a liquid used for such washing.Medical dictionary. 2011.