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HYDRAULICS
Etymology
Noun
hydraulics (uncountable)
The engineering science that deals with practical applications where liquid is in motion and transmits energy.
The hydraulic system of a vehicle or other machine.
Source: Wiktionary
Hy*drau"lics, n. Etym: [Cf. F. hydraulique.]
Definition: That branch of science, or of engineering, which treats of fluids in motion, especially of water, its action in rivers and canals, the works and machinery for conducting or raising it, its use as a prime mover, and the like.
Note: As a science, hydraulics includes hydrodynamics, or the principles of mechanics applicable to the motion of water; as a branch of engineering, it consists in the practical application of the mechanics of fluids to the control and management of water with reference to the wants of man, including canals, waterworks, hydraulic machines, pumps, water wheels, etc. Some writers treat hydraulics and hydrostatics as subdivisions of hydrodynamics.
HYDRAULIC
Hy*drau"lic, a. Etym: [F. hydraulique, L. hydraulicus, fr. Gr. "y`dwr water + Hydra.]
Definition: Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock, crane, or dock. Hydraulic accumulator, an accumulator for hydraulic machinery of any kind. See Accumulator, 2.
– Hydraulic brake, a cataract. See Cataract, 3.
– Hydraulic cement, a cement or mortar made of hydraulic lime, which will harden under water.
– Hydraulic elevator, a lift operated by the weight or pressure of water.
– Hydraulic jack. See under Jack.
– Hydraulic lime, quicklime obtained from hydraulic limestone, and used for cementing under water, etc.
– Hydraulic limestone, a limestone which contains some clay, and which yields a quicklime that will set, or form a firm, strong mass, under water.
– Hydraulic main (Gas Works), a horizontal pipe containing water at the bottom into which the ends of the pipes from the retorts dip, for passing the gas through water in order to remove ammonia.
– Hydraulic mining, a system of mining in which the force of a jet of water is used to wash down a bank of gold-bearing gravel or earth. [Pacific Coast] -- Hydraulic press, a hydrostatic press. See under Hydrostatic.
– Hydraulic propeller, a device for propelling ships by means of a stream of water ejected under water rearward from the ship.
– Hydraulic ram, a machine for raising water by means of the energy of the moving water of which a portion is to be raised. When the rush of water through the main pipe d shuts the valve at a, the momentum of the current thus suddenly checked forces part of it into the air chamber b, and up the pipe c, its return being prevented by a valve at the entrance to the air chamber, while the dropping of the valve a by its own weight allows another rush through the main pipe, and so on alternately.
– Hydraulic valve. (Mach.) (a) A valve for regulating the distribution of water in the cylinders of hydraulic elevators, cranes, etc. (b) (Gas Works) An inverted cup with a partition dipping into water, for opening or closing communication between two gas mains, the open ends of which protrude about the water.
Source: Webster’s Unabridged Dictionary 1913 Edition
Word of the Day
16 November 2024
LEAVE
(verb) go and leave behind, either intentionally or by neglect or forgetfulness; “She left a mess when she moved out”; “His good luck finally left him”; “her husband left her after 20 years of marriage”; “she wept thinking she had been left behind”
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