fluid


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fluid,

any substance that is able to flow. Of the four states of matterstates of matter,
forms of matter differing in several properties because of differences in the motions and forces of the molecules (or atoms, ions, or elementary particles) of which they are composed.
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, only a solidsolid,
one of the three commonly recognized states in which matter occurs, i.e., that state, as distinguished from liquid and gas, in which a substance has both a definite shape and a definite volume.
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 is not a fluid, since it has a definite shape that is not readily changed. Any liquidliquid,
one of the three commonly recognized states in which matter occurs, i.e., that state, as distinguished from solid and gas, in which a substance has a definite volume but no definite shape.
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, gasgas,
in physics, one of the three commonly recognized states of matter, the other two being solid and liquid. A substance in the gaseous state has neither definite shape nor definite volume. Like liquids, gases are fluids and assume the shape of their containers.
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, or plasmaplasma,
in physics, fully ionized gas of low density, containing approximately equal numbers of positive and negative ions (see electron and ion). It is electrically conductive and is affected by magnetic fields.
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 is classed as a fluid.

fluid

[′flü·əd]
(physics)
An aggregate of matter in which the molecules are able to flow past each other without limit and without fracture planes forming.

fluid

1. a substance, such as a liquid or gas, that can flow, has no fixed shape, and offers little resistance to an external stress
2. capable of flowing and easily changing shape
References in periodicals archive ?
Once the infection clears, fluid may remain in the middle ear for several months.
Cognitive and physical changes make the resident totally dependent upon staff to get an adequate fluid intake.
Contact with urine and stool should be avoided, because other pathogens (such as CMV or diarrhea causative agents) can be spread via these fluids.
As a consequence, quality fluid formulators are involved in a never-ending search to make their fluids ever more resistant to biological deterioration and, thereby, longer lived by careful raw material selection and, frequently, by incorporating microbiocides in the formulations.
The on-site processor continually circulates a PCB leaching fluid throughout the transformer to remove residual and absorbed PCBS.
com/research/f913ab/composition_and_pr) has announced the addition of Elsevier Science and Technology's new report "Composition and Properties of Drilling and Completion Fluids.
The RSU delivers 4 cubic inches of fluid per stroke or a quart per 17 strokes.
This suggests that a complex behavioral component is involved in determining fluid consumption by exercising athletes.
That last step was "really a breakthrough from my point of view," comments Roberto Benzi of the University of Rome Tor Vergata, a pioneer in the use of the Boltzmann equation for fluid flows.
Sports drinks with a light flavor and small amount of sodium encourage athletes to drink, and drinking fluids is the first-line of defense against dehydration.
Other than contaminated fluids, no chemicals or other substances known to cause HP are used at the facility.
The sand cascades over an adjustable weir and passes down into an externally fired fluid bed reactor that introduces 550F secondary air from the recuperator.