Sluice

An artifical passage for water, fitted with a valve or gate, as in a mill stream, for stopping or regulating the flow; also, a water gate or flood gate.

Hence, an opening or channel through which anything flows; a source of supply.

The stream flowing through a flood gate.

A long box or trough through which water flows, -- used for washing auriferous earth.

To emit by, or as by, flood gates.

To wet copiously, as by opening a sluice; as, to sluice meadows.

To wash with, or in, a stream of water running through a sluice; as, to sluice eart or gold dust in mining.