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 ?
Clinical Samples Cfu/100m Enterococcus Enterococcus faecalis faecium Urine 37 21 Stool 21 5 Purulent fluid inside 12 4 Blood and plasma 18 5 Peritoneal fluid 17 3 Total 105 38 Amount [%] 73.
DNA was extracted from the trichomonad culture and peritoneal fluid by using the QIAamp DNA minikit (QIAGEN, Valencia, CA, USA).
Since peritoneal fluid is in contact with peritoneal endometrial implants, as well as with the tubal microenvironment in which fertilization occurs, subtle alterations of this fluid and/or its cellular constituents might adversely influence reproduction independent of any anatomical compromising of ovaries or oviducts.
The reproduction-related body fluids breast milk, seminal fluid, and amniotic fluid all clustered together with bronchial lavage, peritoneal fluid, saliva, and tears.
Pharmacokinetic and pharmacodynamic profiling of cefepime in plasma and peritoneal fluid of abdominal surgery patients.
The positive yield of an acid-fast bacillus smear and mycobacterial culture of pleural effusion or ascites could have been enhanced with centrifugation of 1 L of peritoneal fluid before conducting the test.
Used in blunt or penetrating torso trauma to detect free peritoneal fluid, the four-view approach is used, namely: hepato-renal space (Morrison's pouch), perisplenic area, retro-vesical/uterine space (Douglas' pouch) and subcostal pericardial view.
Clinical studies have demonstrated that women with endometriosis have increased volume of peritoneal fluid, increased concentration of activated macrophages, and increased peritoneal concentrations of prostaglandins, interleukin-1, tumor necrosis factor, and proteases.
IL-12 plasmid was detectable in peritoneal fluid of all evaluable patients and in blood samples of only a few patients at considerably lower level, suggesting that the plasmid delivery following EGEN-001 administration was localized at the delivery site, a major advantage of EGEN-001 therapy over recombinant protein therapy.
Peritoneal fluid cell count, culture and sensitivity, peritoneal amylase level (>50 [micro]m/L suggests an intra-abdominal process) should be obtained.
A group of 341 women with no symptoms who reported a family history of ovarian cancer were screened each year with both tests to detect peritoneal fluid and ovarian masses.
Indeed, at the end of the study, the levels of inflammatory markers in peritoneal fluid of women who received the vitamins were significantly lower than the levels in the placebo group.