The Collaborative International Dictionary of English v.0.48:

Sluice \Sluice\, v. t. [imp. & p. p. Sluiced; p. pr. & vb. n.
   Sluicing.]
   1. To emit by, or as by, flood gates. [R.] --Milton.
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   2. To wet copiously, as by opening a sluice; as, to sluice
      meadows. --Howitt.
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            He dried his neck and face, which he had been
            sluicing with cold water.             --De Quincey.
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   3. To wash with, or in, a stream of water running through a
      sluice; as, to sluice eart or gold dust in mining.
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