Adjacent Words

Fluid definitions

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Webster's 1828 Dictionary

FLU'ID, a. [L. fluidus, from fluo, to flow.] Having parts which easily move and change their relative position without separation, and which easily yield to pressure; that may flow; liquid. Water, spirit, air, are fluid substances. All bodies may be rendered fluid by heat or caloric.
FLU'ID, n. Any substance whose parts easily move and change their relative position without separation, and which yields to the slightest pressure; a substance which flows, or which moves spontaneously on a plane with the least inclination; a liquid; liquor; opposed to a solid. Water, blood, chyle, are fluids.

WordNet (r) 3.0 (2005)

adj
1: subject to change; variable; "a fluid situation fraught with uncertainty"; "everything was unstable following the coup" [syn: fluid, unstable]
2: characteristic of a fluid; capable of flowing and easily changing shape [syn: fluid, runny]
3: smooth and unconstrained in movement; "a long, smooth stride"; "the fluid motion of a cat"; "the liquid grace of a ballerina" [syn: fluent, fluid, liquid, smooth]
4: in cash or easily convertible to cash; "liquid (or fluid) assets" [syn: fluid, liquid]
5: affording change (especially in social status); "Britain is not a truly fluid society"; "upwardly mobile" [syn: fluid, mobile] n
1: a substance that is fluid at room temperature and pressure
2: continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas

Merriam Webster's

I. adjective Etymology: French or Latin; French fluide, from Latin fluidus, from fluere to flow; akin to Greek phlyzein to boil over Date: 1603 1. a. having particles that easily move and change their relative position without a separation of the mass and that easily yield to pressure ; capable of flowing b. subject to change or movement <boundaries became fluid> 2. characterized by or employing a smooth easy style <the ballerina's fluid movements> <fluid recitation of his lines> 3. a. available for various uses <a fluid computer program> b. liquid 4 <fluid assets> • fluidly adverb • fluidness noun II. noun Date: 1661 a substance (as a liquid or gas) tending to flow or conform to the outline of its container • fluidal adjective • fluidally adverb • fluidlike adjective

Oxford Reference Dictionary

n. & adj. --n. 1 a substance, esp. a gas or liquid, lacking definite shape and capable of flowing and yielding to the slightest pressure. 2 a fluid part or secretion. --adj. 1 able to flow and alter shape freely. 2 constantly changing or fluctuating (the situation is fluid). 3 (of a clutch, coupling, etc.) in which liquid is used to transmit power. Phrases and idioms: fluid drachm see DRACHM. fluid ounce see OUNCE(1). Derivatives: fluidify v.tr. (-ies, -ied). fluidity n. fluidly adv. fluidness n. Etymology: F fluide or L fluidus f. fluere flow

Webster's 1913 Dictionary

Fluid Flu"id, n. A fluid substance; a body whose particles move easily among themselves. Note: 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. (a) 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. (b) 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. (Physiol.) 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 under Burning, Elastic, etc.

Webster's 1913 Dictionary

Fluid Flu"id, a. [L. fluidus, fr. fluere to flow: cf. F. fluide. See Fluent.] 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.

Collin's Cobuild Dictionary

(fluids) 1. A fluid is a liquid. (FORMAL) The blood vessels may leak fluid, which distorts vision... Make sure that you drink plenty of fluids. ...fluid retention. N-MASS 2. Fluid movements or lines or designs are smooth and graceful. The forehand stroke should be fluid and well balanced. ADJ 3. A situation that is fluid is unstable and is likely to change often. = changeable ADJ: usu v-link ADJ

Soule's Dictionary of English Synonyms

I. a. Liquid and gaseous, liquid or gaseous (as the case may be). II. n. Liquid, liquor; gas, vapor.

Moby Thesaurus

able to adapt, adaptable, adjustable, aerodynamics, afterdamp, air, alterable, alterative, aqueous, atmosphere, beverage, blackdamp, blood, breath, changeable, changeful, checkered, chokedamp, cloud, damp, drink, effluvium, ever-changing, exhalation, fetid air, firedamp, flatus, flexible, flowing, fluent, fluid extract, fluid mechanics, fluidal, fluidic, fluxible, fluxile, fluxional, fluxionary, formless, fume, gas, halogen gas, hydraulics, hydrogeology, ichor, impermanent, indefinite, inert gas, juice, juicy, kaleidoscopic, latex, liquid, liquid extract, liquidy, liquor, malaria, malleable, many-sided, mephitis, mercurial, metamorphic, miasma, milk, mobile, modifiable, movable, mutable, nonuniform, permutable, plastic, pliant, pneumatics, protean, proteiform, puff of smoke, reek, resilient, rubbery, running, runny, sap, sappy, semiliquid, shifting, smoke, smudge, solution, steam, succulent, supple, transient, transitory, uncertain, unfixed, unformed, unsettled, unstable, unsteady, vapor, variable, volatile, water, water vapor, watery, whey