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 ?
KEEP THIS INFO ABOUT SILICONE BRAKE FLUID (BFS) IN MIND .
Published data show that an education program advising athletes on the risks of overdrinking, together with limiting fluid availability at a race, has been associated with a reduction in the incidence of EAH without deleterious effects (42,75).
The mask contains the drawings of the fluid channel elements and an alignment mark for rotational alignment to the flat of the silicon wafer.
If biobased lubricants grow to become a significant portion of the industrial fluids market, farmers will need to grow more oilseeds.
Remember that, while dehydration is a far more common problem, things aren't as simple as "the more fluid the better.
The influence of the components of metalworking fluid or of chlorine or other disinfectants in water upon aerosolization mycobacteria is unknown.
Fluid also creates a coating on the walls of the bore hole to lubricate the hole and reduce friction.
Users should take corrective action or replace fluids when the change exceeds 10 percent compared with new fluid.
An eardrum with fluid behind it does not move as well as an eardrum with air behind it.
Dehydration Diagnosis (I3)(*), Weight Fluctuations (J1a)(*), Dehydrated (J1c)(*), or insufficient fluid (J1d)(*);
In very rare circumstances, contact with blood or other body fluids can be a means of infection transmission.
Lubrication from the fluid aids in generating the desired workpiece shape, surface finish, and surface integrity while increasing tool and wheel life.