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The act or process of converting into vapor, or of passing off in vapor; evaporation. [R.]

The change of vapor into water, as in the formation of rain.

any substance is converted from a liquid state into, and carried off in, vapor; as, the evaporation of water, of ether, of camphor.

A vessel of porous earthenware, used for cooling liquids by evaporation from the exterior surface.

An instrument for measuring the evaporation from water, ice, or snow. Brande & C.

An instrument for measuring the rate of evaporation from a moist surface; an evaporometer. Huxley.

The act of flying; flight; evaporation. [Obs.]

Salt which has been obtained from sea water, by evaporation in shallow pits or basins, by the heat of the sun; the large crystalline salt of commerce. Bacon. Ure.

To form, or separate, by boiling or evaporation; as, to boil sugar or salt.

ong saline solution; also, the saline residue or strong mother liquor resulting from the evaporation of natural or artificial waters.

A dry, brown, astringent extract, obtained by decoction and evaporation from the Acacia catechu, and several other plants growing in India. It contains a large portion of tannin or tannic acid, and is used in medicine and in the arts. It is also known by the names terra japonica, cutch, gambier, etc. Ure. Dunglison.…

To concrete, coagulate, or thicken, as soft or fluid matter by evaporation; to become a cot or clod.

To cause (a liquid) to change into a curdlike or semisolid state, not by evaporation but by some kind of chemical reaction; to curdle; as, rennet coagulates milk; heat coagulates the white of an egg.

The change from a liquid to a thickened, curdlike, insoluble state, not by evaporation, but by some kind of chemical reaction; as, the spontaneous coagulation of freshly drawn blood; the coagulation of milk by rennet, or acid, and the coagulation of egg albumin by heat. Coagulation is generally the change of an albumin…

o intensify, by getting rid of useless material; to condense; as, to concentrate acid by evaporation; to concentrate by washing; -- opposed to Ant: dilute. Spirit of vinegar concentrated and reduced to its greatest strength. Arbuthnot.

The act or process of reducing the volume of a liquid, as by evaporation. The acid acquires a higher degree of concentration. Knight.

steam into water. Condensed milk, milk reduced to the consistence of very thick cream by evaporation (usually with addition of sugar) for preservation and transportation. -- Condensing engine, a steam engine in which the steam is condensed after having exerted its force on the piston.

An instrument used to illustrate the freezing of water by its own evaporation. The ordinary form consist of two glass bulbs, connected by a tube of the same material, and containing only a quantity of water and its vapor, devoid of air. The water is in one of the bulbs, and freezes when the other is cooled below 32º Fa…

To deprive of superabundant water, as by evaporation or distillation; to clear of aqueous matter; to rectify; -- used of spirits and acids.

The operation of separating water from spirits and acids, by evaporation or repeated distillation; -- called also concentration, especially when acids are the subject of it. [Obs.]