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

Pertaining to a fluid, or to its flowing motion. Fluidal structure (Geol.), the structure characteristic of certain volcanic rocks in which the arrangement of the minute crystals shows the lines of flow of thew molten material before solidification; -- also called fluxion structure.

The quality of being fluid or capable of flowing; a liquid, aëriform. or gaseous state; -- opposed to solidity. It was this want of organization, this looseness and fluidity of the new movement, that made it penetrate through every class of society. J. R. Green.

To render fluid.

The state of being flluid; fluidity.

See Fluid ounce, under Fluid.

See Fluid dram, under Fluid. Pharm. of the U. S.

An exciting and depolarizing acid solution used in certain cells or batteries, as the Grenet battery. Electropoion is best prepared by mixing one gallon of concentrated sulphuric acid diluted with three gallons of water, with a solution of six pounds of potassium bichromate in two gallons of boiling water. It should be…

To impregnate (wood) with a preservative solution of copper sulphate (often called Mar"ga*ry's flu"id [-riz]).

An artificial nutrient fluid invented by Pasteur for the study of alcoholic fermentation, but used also for the cultivation of bacteria and other organisms. It contains all the elements of protoplasm, and was originally made of the ash of yeast, some ammonia compound, sugar, and water.

Imperfectly fluid. -- n.

The passage of blood or other fluid into parts not appropriate for it.

Any substance which absorbs and neutralizes acid fluid in the stomach and bowels, as magnesia, chalk, etc.; also a substance e. g., iodine) which acts on the absorbent vessels so as to reduce enlarged and indurated parts.

A larval entozoön in the form of a subglobular or oval vesicle, or hy datid, filled with fluid, sometimes found in the tissues of man and the lower animals; -- so called from the absence of a head or visible organs on the vesicle. These cysts are the immature stages of certain tapeworms. Also applied to similar cysts o…

Uncolored; not absorbing color from a fluid; -- said of tissue. Achromatic lens (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced…

Tissue which is not stained by fluid dyes. W. Flemming.

v. Adiabatic line or curve, a curve exhibiting the variations of pressure and volume of a fluid when it expands without either receiving or giving out heat. Rankine.

Having the form or nature of air, or of an elastic fluid; gaseous. Hence fig.: Unreal.

d oxygen for their growth; as the microbacteria which form on the surface of putrefactive fluids.

The science of equilibrium and motion of air or an aëriform fluid, including aërodynamics and aërostatics.