a substance, as a liquid or gas, that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape.
–adjective
2.
pertaining to a substance that easily changes its shape; capable of flowing.
3.
consisting of or pertaining to fluids.
4.
changing readily; shifting; not fixed, stable, or rigid: fluid movements.
5.
convertible into cash: fluid assets.
[Origin: 1595–1605; < L fluidus, equiv. to flu(ere) to flow + -idus-id4]
flu·idAudio Help (flōō'ĭd) Pronunciation Key
n.
A continuous, amorphous substance whose molecules move freely past one another and that has the tendency to assume the shape of its container; a liquid or gas.
adj.
Of, relating to, or characteristic of a fluid.
Readily reshaped; pliable.
Smooth and flowing; graceful: the fluid motion of a cat.
Changing or tending to change; variable: a fluid situation fraught with uncertainty.
Characterized by or allowing social mobility: a fluid society.
Convertible into cash: fluid assets.
[From Middle English, flowing, from Old French fluide, from Latin fluidus, from fluere, to flow; see bhleu- in Indo-European roots.]
fluidAudio Help (fl'ĭd) Pronunciation Key
A state of matter, such as liquid or gas, in which the component particles (generally molecules) can move past one another. Fluids flow easily and conform to the shape of their containers. See also state of matter, viscosity.
Main Entry: 2fluid Function: noun : a substance (as a liquid or gas) tending to flow or conform to the outline of its container; specifically:
one in the body of an animal or plant —see CEREBROSPINAL FLUID, SEMINAL FLUID
Main Entry: 1flu·id Pronunciation: 'flü-&d Function: adjective : 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
Dram\, n. [OF. drame, F. drachme, L. drachma, drachm, drachma, fr. Gr. ?, prop., a handful, fr. ? to grasp. Cf. Drachm, Drachma.]1. A weight; in Apothecaries' weight, one eighth part of an ounce, or sixty grains; in Avoirdupois weight, one sixteenth part of an ounce, or 27.34375 grains. 2. A minute quantity; a mite. Were I the chooser, a dram of well-doing should be preferred before many times as mush the forcible hindrance of evildoing. --Milton. 3. As much spirituous liquor as is usually drunk at once; as, a dram of brandy; hence, a potation or potion; as, a dram of poison. --Shak. 4. (Numis.) A Persian daric. --Ezra ii. 69. Fluid dram, or Fluid drachm. See under 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.
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.
In"flu*ent\, a. [L. influens, -entis, p. pr. of influere, influxum, to flow in; pref. in- in + fluere to flow. See Fluid.]1. Flowing in. "With influent tide." --Cowper. "Influent odors." --Mrs. Browning. 2. Exerting influence; influential. [Obs.] I find no office by name assigned unto Dr.Cox, who was virtually influent upon all, and most active. --Fuller.
Ounce\, n. [F. once, fr. L. uncia a twelfth, the twelfth part of a pound or of a foot: cf. Gr. ? bulk, mass, atom. Cf. 2d Inch, Oke.]1. A weight, the sixteenth part of a pound avoirdupois, and containing 437? grains. 2. (Troy Weight) The twelfth part of a troy pound. Note: The troy ounce contains twenty pennyweights, each of twenty-four grains, or, in all, 480 grains, and is the twelfth part of the troy pound. The troy ounce is also a weight in apothecaries' weight. [Troy ounce is sometimes written as one word, troyounce.] 3. Fig.: A small portion; a bit. [Obs.] By ounces hung his locks that he had. --Chaucer. Fluid ounce. See under Fluid, n.
Sol"id\, a. [L. solidus, probably akin to sollus whole, entire, Gr. ???: cf. F. solide. Cf. Consolidate,Soda, Solder, Soldier, Solemn.]1. Having the constituent parts so compact, or so firmly adhering, as to resist the impression or penetration of other bodies; having a fixed form; hard; firm; compact; -- opposed to fluid and liquid or to plastic, like clay, or to incompact, like sand. 2. Not hollow; full of matter; as, a solid globe or cone, as distinguished from a hollow one; not spongy; dense; hence, sometimes, heavy. 3. (Arith.) Having all the geometrical dimensions; cubic; as, a solid foot contains 1,728 solid inches. Note: In this sense, cubics now generally used. 4. Firm; compact; strong; stable; unyielding; as, a solid pier; a solid pile; a solid wall. 5. Applied to a compound word whose parts are closely united and form an unbroken word; -- opposed to hyphened. 6. Fig.: Worthy of credit, trust, or esteem; substantial, as opposed to frivolous or fallacious; weighty; firm; strong; valid; just; genuine. The solid purpose of a sincere and virtuous answer. --Milton. These, wanting wit, affect gravity, and go by the name of solid men. --Dryden. The genius of the Italians wrought by solid toil what the myth-making imagination of the Germans had projected in a poem. --J. A. Symonds. 7. Sound; not weakly; as, a solid constitution of body. --I. Watts. 8. (Bot.) Of a fleshy, uniform, undivided substance, as a bulb or root; not spongy or hollow within, as a stem. 9. (Metaph.) Impenetrable; resisting or excluding any other material particle or atom from any given portion of space; -- applied to the supposed ultimate particles of matter. 10. (Print.) Not having the lines separated by leads; not open. 11. United; without division; unanimous; as, the delegation is solid for a candidate. [Polit. Cant. U.S.] Solid angle. (Geom.) See under Angle. Solid color, an even color; one not shaded or variegated. Solid green. See Emerald green (a), under Green. Solid measure (Arith.), a measure for volumes, in which the units are each a cube of fixed linear magnitude, as a cubic foot, yard, or the like; thus, a foot, in solid measure, or a solid foot, contains 1,728 solid inches. Solid newel (Arch.), a newel into which the ends of winding stairs are built, in distinction from a hollow newel. See under Hollow, a. Solid problem (Geom.), a problem which can be construed geometrically, only by the intersection of a circle and a conic section or of two conic sections. --Hutton. Solid square (Mil.), a square body or troops in which the ranks and files are equal. Syn: Hard; firm; compact; strong; substantial; stable; sound; real; valid; true; just; weighty; profound; grave; important. Usage: Solid, Hard. These words both relate to the internal constitution of bodies; but hardnotes a more impenetrable nature or a firmer adherence of the component parts than solid. Hard is opposed to soft, and solid to fluid, liquid, open, or hollow. Wood is usually solid; but some kinds of wood are hard, and others are soft. Repose you there; while I [return] to this hard house, More harder than the stones whereof 't is raised. --Shak. I hear his thundering voice resound, And trampling feet than shake the solid ground. --Dryden.
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Audio Help [floo-id] Pronunciation Key 
'ĭd) Pronunciation Key
i·ty (-
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