- 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
--1 is a kind of regulator
--1 is a part of sluice, sluiceway, penstock - sluice, sluiceway, penstock - conduit that carries a rapid flow of water controlled by a sluicegate
--2 is a kind of conduit
--2 has parts:sluicegate, sluice valve, floodgate, penstock, head gate, water gate