hydraulic ram

== English == === Noun === hydraulic ram (plural hydraulic rams) Used other than figuratively or idiomatically: see hydraulic,‎ ram. A water pump in which a flow of water is intermittently halted by a valve so that the flow is forced upward through an open pipe, usually into a reservoir. A hydraulic cylinder with a piston activated by pumping hydraulic fluid into the cylinder. ==== Synonyms ==== (water pump): hydram === See also === water hammer === Further reading === hydraulic ram on Wikipedia.Wikipedia Category:Hydraulic rams on Wikimedia Commons.Wikimedia Commons “hydraulic ram”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.