Definition of Fluid

1. Noun. A substance that is fluid at room temperature and pressure.

Generic synonyms: Substance
Specialized synonyms: Coolant, Filtrate, Ichor, Liquid

2. Adjective. Subject to change; variable. "Everything was unstable following the coup"
Exact synonyms: Unstable
Similar to: Changeable, Changeful
Derivative terms: Fluidness

3. Noun. Continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas.
Generic synonyms: Matter
Specialized synonyms: Gas, Liquid

4. Adjective. Characteristic of a fluid; capable of flowing and easily changing shape.
Exact synonyms: Runny
Similar to: Liquid
Derivative terms: Fluidity, Fluidness, Run, Runniness

5. Adjective. Smooth and unconstrained in movement. "The liquid grace of a ballerina"
Exact synonyms: Fluent, Liquid, Smooth
Similar to: Graceful
Derivative terms: Smoothness

6. Adjective. In cash or easily convertible to cash. "Liquid (or fluid) assets"
Exact synonyms: Liquid
Similar to: Disposable
Derivative terms: Liquidity

7. Adjective. Affording change (especially in social status). "Upwardly mobile"
Exact synonyms: Mobile
Similar to: Changeable, Changeful

Definition of Fluid

1. a. Having particles which easily move and change their relative position without a separation of the mass, and which easily yield to pressure; capable of flowing; liquid or gaseous.

2. n. A fluid substance; a body whose particles move easily among themselves.

Definition of Fluid

1. Noun. Any substance which can flow with relative ease, tends to assume the shape of its container, and obeys Bernoulli's principle; a liquid, gas or plasma ¹

2. Adjective. (not comparable) Of, or relating to fluid. ¹

3. Adjective. In a state of flux; subject to change. ¹

4. Adjective. Moving smoothly, or giving the impression of a liquid in motion. ¹

5. Adjective. (context: of an asset) Convertible into cash. ¹

¹ Source:

Definition of Fluid

1. a substance that tends to flow [n -S] : FLUIDAL [adj]

Medical Definition of Fluid

1. Having particles which easily move and change their relative position without a separation of the mass, and which easily yield to pressure; capable of flowing; liquid or gaseous. Origin: L. Fluidus, fr. Fluere to flow: cf. F. Fluide. See Fluent. A fluid substance; a body whose particles move easily among themselves. Fluid is a generic term, including liquids and gases as species. Water, air, and steam are fluids. By analogy, the term is sometimes applied to electricity and magnetism, as in phrases electric fluid, magnetic fluid, though not strictly appropriate. Fluid dram, or Fluid drachm, a measure of capacity equal to one eighth of a fluid ounce. Fluid ounce. In the United States, a measure of capacity, in apothecaries' or wine measure, equal to one sixteenth of a pint or 29.57 cubic centimeters. This, for water, is about 1.04158 ounces avoirdupois, or 455.6 grains. In England, a measure of capacity equal to the twentieth part of an imperial pint. For water, this is the weight of the avoirdupois ounce, or 437.5 grains. Fluids of the body. The circulating blood and lymph, the chyle, the gastric, pancreatic, and intestinal juices, the saliva, bile, urine, aqueous humor, and muscle serum are the more important fluids of the body. The tissues themselves contain a large amount of combined water, so much, that an entire human body dried in vacuo with a very moderate degree of heat gives about 66 per cent of water. Burning fluid, Elastic fluid, Electric fluid, Magnetic fluid, etc. See Burning, Elastic, etc. Source: Websters Dictionary (01 Mar 1998)

Fluid Pictures

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Lexicographical Neighbors of Fluid

fluffy omelet
fluid (current term)
fluid bilayer model
fluid drachm
fluid drachms
fluid dram
fluid drive
fluid dynamics
fluid feeder
fluid intelligence
fluid measure
fluid mechanics
fluid mosaic model
fluid ounce
fluid ounces
fluid retention

Literary usage of Fluid

Below you will find example usage of this term as found in modern and/or classical literature:

1. Proceedings of the Royal Society of London by Royal Society (Great Britain) (1887)
"The fluid will be thrown off the globe at a belt of a certain breadth, and a violently disturbed ... The fluid must, as indicated by the arrow-heads in fig. ..."

2. A Treatise on Electricity and Magnetism by James Clerk Maxwell (1881)
"Theory of One fluid. 37.] In the theory of One fluid everything is the same as in the theory of Two fluids except that, instead of supposing the two ..."

3. The Medical Clinics of North America by Richard J. Havel, K. Patrick Ober (1917)

4. Encyclopaedia Britannica: A Standard Work of Reference in Art, Literature (1907)
"In a fluid at rest, then, the pressure over any surface which we may imagine to be drawn is perpen- /licular (or normal) to the surface at every point of it ..."

5. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1891)
"Clear fluid welled up at once on withdrawing the trocar, and more than four drachms of fluid escaped during the next twenty-four hours. ..."

6. The American Naturalist by American Society of Naturalists, Essex Institute (1880)
"together with the following formula for the preparation of the fluid : In 3000 grammes of boiling water dissolve Alum 100 grammes. ..."

7. Mathematical and Physical Papers by Sir George Gabriel Stokes, Baron John William Strutt Rayleigh (1880)
"ON SOME CASES OF fluid MOTION. [Read May 29, 1843.] THE equations of Hydrostatics are founded on the principles that the mutual action of two adjacent ..."

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