penstock Syllabification: (pen·stock)Pronunciation: /ˈpenˌstäk/Definition of penstock noun a sluice or floodgate for regulating the flow of a body of water. a channel for conveying water to a waterwheel or turbine. Origin: early 17th century: from pen2 (in the sense 'milldam') + stockpenstock in other Oxford dictionaries Definition of penstock in the British & World English dictionary
