1. (

• sluicegate ,
• sluice_valve ,
• floodgate ,
• penstock ,
• head_gate ,
• water_gate

) regulator consisting of a valve or gate that controls the rate of water flow through a sluice ;

2. (

• sluice ,
• sluiceway ,
• penstock

) conduit that carries a rapid flow of water controlled by a sluicegate ;