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 ?
Against this background, to determine whether the reduction of p-PPAR[gamma] could lead to fluid retention, we examined the expression of AQP2 and [alpha]ENaC proteins, which are related to body fluid homeostasis [10, 11].
Pitting was evident around both ankles where the fluid retention was most severe, but there was no evidence of trauma or injury to the ankles.
Results for urine outputs, fluid retention, and weight gain are presented in Table 2.
We propose a possible second trigger for adverse effects related to fluid retention, namely garlic and chillies.
Thiazide diuretics, such as chlorothiazide and hydrochlorothiazide, raise calcium levels and typically are preferred for treating high blood pressure, but they lack the potency of loop diuretics to combat severe fluid retention from heart or liver failure.
Drinking more water will not increase fluid retention but helps to flush fluids from the body.
They act through enhancing glucose sensitive insulin secretion and insulin sensitivity and, compared to existing treatments, are expected to offer a superior side effect profile in terms of greatly reduced risk of hypoglycemia, weight gain, fluid retention and nausea.
While the TZDs are associated with significant reductions in hemoglobin [A.sub.1c] levels, their use is limited by high rates of weight gain and fluid retention, said Dr.
Multiple potential stimuli to AVP secretion can exacerbate fluid retention at any time during prolonged exercise (21,61).
Reduce puffy ankles by drinking two extra pints of water a day, as water reduces fluid retention. Wear tights and shoes of the same shade
Cyclical bloating can be due to fluid retention which should settle during the Pill-free week.
Mountaineers who climb too quickly often suffer from the potentially deadly condition where blood pressure increases in the vessels, leading to the lungs, causing fluid retention. That in turn can cause shortness of breath and extreme tiredness, unconsciousness or in some cases even death.