hydraulic ram

hydraulic ram

noun
a device by which the energy of descending water is utilized to raise a part of the water to a height greater than that of the source.

Origin:
1800–10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Hydraulic ram is always a great word to know.
So is doohickey. Does it mean:
a chattering or flighty, light-headed person.
a gadget; dingus; thingumbob.
Collins
World English Dictionary
hydraulic ram
 
n
1.  any large device involving the displacement of a piston or plunger driven by fluid pressure
2.  a form of water pump utilizing the kinetic energy of running water to provide static pressure to raise water to a reservoir higher than the source

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