Search the Dictionary

l, may be made to counterbalance any weight, however great; or the law of the equality of pressure of fluids in all directions. -- Hydrostatic press, a machine in which great force, with slow motion, is communicated to a large plunger by means of water forced into the cylinder in which it moves, by a forcing pump of s…

The branch of science which relates to the pressure and equilibrium of nonelastic fluids, as water, mercury, etc.; the principles of statics applied to water and other liquids.

Relating to the production of hypnotic sleep; as, the so-called hypnogenic pressure points, pressure upon which is said to cause an attack of hypnotic sleep. De Watteville.

eeble organization, by gazing steadly at a very bright object held before the eyes, or by pressure upon certain points of the surface of the body.

An instrument for measuring heights by observation of barometric pressure; esp., one for determining heights by ascertaining the boiling point of water. It consists of a vessel for water, with a lamp for heating it, and an inclosed thermometer for showing the temperature of ebullition.

y the occurrence of epileptiform convulsions, which can often be controlled or excited by pressure on the ovaries, and upon other definite points in the body. -- Hys`ter*o*ep`i*lep"tic, a.

Producing hysteria; as, the hysterogenicpressure points on the surface of the body, pressure upon which is said both to produce and arrest an attack of hysteria. De Watteville.

To press, stamp, or print something in or upon; to mark by pressure, or as by pressure; to imprint (that which bears the impression). His heart, like an agate, with your print impressed. Shak.

The pressure of the type on the paper, or the result of such pressure, as regards its appearance; as, a heavy impression; a clear, or a poor, impression; also, a single copy as the result of printing, or the whole edition printed at a given time. Ten impressions which his books have had. Dryden.

To impress; to mark by pressure; to indent; to stamp. And sees his num'rous herds imprint her sands. Prior.

y inches, by slow degrees, gradually. -- Inch of candle. See under Candle. -- Inches of pressure, usually, the pressure indicated by so many inches of a mercury column, as on a steam gauge. -- Inch of water. See under Water. -- Miner's inch, (Hydraulic Mining), a unit for the measurement of water. See Inch of water…

kes an oblique angle with the plane of the horizon; a sloping plane. When used to produce pressure, or as a means of moving bodies, it is one of the mechanical powers, so called. (b) (Railroad & Canal) An inclined portion of track, on which trains or boats are raised or lowered from one level to another.…

Not capable of being reduced to the form of a liquid by pressure; -- said of any gas above its critical point; -- also particularly of oxygen, hydrogen, nitrogen, and carbon monoxide, formerly regarded as incapable of liquefaction at any temperature or pressure.

The quality of being incompressible, or incapable of reduction in volume by pressure; -- formerly supposed to be a property of liquids. The incompressibility of water is not absolute. Rees.

Not compressible; incapable of being reduced by force or pressure into a smaller compass or volume; resisting compression; as, many liquids and solids appear to be almost incompressible. -- In`com*press"i*ble*ness, n.

A pressure gauge; a water gauge, as for a steam boiler; an apparatus or instrument for showing the working of a machine or moving part; as:

same manner in vacuo as in the open air,and therefore are not influenced by the weight or pressure of the atmosphere. Sir I. Newton. This standing revelation . . . is sufficient to influence their faith and practice, if they attend. Attebury. The principle which influenced their obedience has lost its efficacy. Rogers.…

A leaning; pressure; weight. [R.] Sir T. Browne.

The magnitude of a distributed force, as pressure, stress, weight, etc., per unit of surface, or of volume, as the case may be; as, the measure of the intensity of a total stress of forty pounds which is distributed uniformly over a surface of four square inches area is ten pounds per square inch.

or pertaining to, any engine (called an Internal- combustion engine) in which the heat or pressure energy necessary to produce motion is developed in the engine cylinder, as by the explosion of a gas, and not in a separate chamber, as in a steam- engine boiler. The gas used may be a fixed gas, or one derived from alcoh…