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 ?
The results (Table 1.) revealed that irregular shaped, smooth, highly fluidal colonies were developed on Triphenyl tetrazolium chloride, Casamino peptone glucose, Potato dextrose agar and SMSA media; while, round small colonies developed on rest of the test media viz., Nutrient agar, Yeast extract milk agar, Yeast extract agar, Yeast extract peptone agar and Yeast extract chalk agar.
Roca de textura afirica hialopilitica fluidal formada por microlitos de plagioclasa, ortopiroxeno, minerales opacos y olivina en orden de abundancia, los que se encuentran dispersos en una mesostasis vitrea.
solanacearum, showed virulent, fluidal, irregular and creamy white with pink at the centre on TTC medium.
Fluidal colonies with reddish pink center and irregular margins are usually virulent while dark colored non-fluidal colonies with darker colors and smooth margins are normally avirulent.
A menudo la estructura de la roca es fluidal y en los afloramientos se separan en forma de tablas o laminas.
La matriz es vitroclastica a microcristalina por desvitrificacion, con trizas de vidrio muy deformadas lo que genera estructuras fluidales muy marcadas.
Los microcristales de la matriz estan entrecruzados con piroxeno intergranular (FIGURA 3D), o muestran orientacion fluidal.
Cuerpos hipoabisales mas recientes, los encontramos en la fila Costena por China Kicha en el sill (?) diabasico del cerro Las Bolas (6,4-6,2 Ma) y en un dique andesitico rico en plagioclasa con marcada estructura fluidal (6,1 Ma), presente en la quebrada La Danta (MacMillan et al., 2004).
Las muestras analizadas corresponden a andesitas porfiriticas, hipocristalinas, inequigranulares, de grano fino a medio, con textura seriada, compuestas por fenocristales de plagioclasa, (39-61%) [+ o -] augita (5-12%) [+ o -] hiperstena (5-20%) [+ o -] oxihornblenda (0-10%) [+ o -] olivino (0-4%) [+ o -] biotita (0-3%) (TABLA 1), con fenocristales euhedrales a subhedrales de hasta 5 mm, inmersos en matriz microlitica criptocristalina, en ocasiones con microestructura fluidal. Como minerales accesorios se encuentran trazas de opacos (oxidos de Fe-Ti), apatito, circon y hematita.
12, medium-grained structure, and intergranular and rare fluidal texture, marked by the arrangement of platy minerals (plagioclases), were observed.
In that location the ignimbrite does not have a defined base, with a vitrophyre, but rather appears to continue downward into fluidal rhyolites, suggesting that the ignimbrite corresponds to an intracaldera facies rather than an outflow sheet.
El paleo-volcan Alcantara esta constituido predominantemente por coladas de lava vidriosas piroxenicas (sin minerales hidroxilados), lajeadas, con estructuras fluidal, perlitica, asi como depositos de flujos piro clasticos densos (?reo-i gnimbritas?), ambos con pliegues, fallas sineruptivas, conformando el borde festoneado de la caldera Aleantaro-Guachipelin-Canas Dulces.