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on center; to unite more closely; to gather into one body, mass, or force; to fix; as, to concentrate rays of light into a focus; to concentrate the attention. (He) concentrated whole force at his own camp. Motley.

To withdraw from concentration; to decentralize. [R.]

To concentrate again; to concentrate thoroughly.

That which comprises or concentrates in itself the essential qualities of a larger thing or of several things. Specifically: A summary or an epitome, as of a treatise or book, or of a statement; a brief. An abstract of every treatise he had read. Watts. Man, the abstract Of all perfection, which the workmanship Of Heav…

To rest or fasten; to fix; to concentrate. [Obs.] We may arrest our thoughts upon the divine mercies. Jer. Taylor.

be for directing a jet of air into a fire or into the flame of a lamp or candle, so as to concentrate the heat on some object.

An apparatus, especially an inclined trough or vat, in which stamped ore is concentrated by subjecting it to the action of rynning water so as to wash out the lighter and less valuable portions.

m the sap of the bitter cassava (Manihot utilissima) deprived of its poisonous qualities, concentrated by boiling, and flavored with aromatics. See Pepper pot.

ing to catoptrics; produced by reflection. Catoptric light, a light in which the rays are concentrated by reflectors into a beam visible at a distance.

To be collected to a point; to be concentrated; to rest on, or gather about, as a center. Where there is no visible truth wherein to center, error is as wide as men's fancies. Dr. H. More. Our hopes must center in ourselves alone. Dryden.

Compact; pressed close; concentrated; firmly united.

irect to a common center; to bring together at a focus or point, as two or more lines; to concentrate. In thee concentering all their precious beams. Milton. All is concentered in a life intense. Byren.

The act or process of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration. Concentration of the lunar beams. Boyle. Intense concetration of thought. Sir J. Herschel.

Serving or tending to concentrate; characterized by concentration. A discrimination is only possible by a concentrative act, or act of attention. Sir W. Hamilton.

To make more close, compact, or dense; to compress or concentrate into a smaller compass; to consolidate; to abridge; to epitomize. In what shape they choose, Dilated or condensed, bright or obscure. Milton. The secret course pursued at Brussels and at Madrid may be condensed into the usual formula, dissimulation, proc…

Gathered into a ball or a mass; collected together; concentrated; as, conglomerate rays of light. Beams of light when they are multiplied and conglomerate. Bacon. Fluids are separated in the liver and the other conglobate and conglomerate glands. Cheyne.

m the center or place of concentration; to divide and distribute (what has been united or concentrated); -- esp. said of authority, or the administration of public affairs.

That which burns by refraction, as a double convex lens, or the sun's rays concentrated by such a lens, sometimes used as a cautery.

r 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 used cold.

, forming an important ingredient of illuminating gas, and also obtained by the action of concentrated sulphuric acid in alcohol. It is an unsaturated compound and combines directly with chlorine and bromine to form oily liquids (Dutch liquid), -- hence called olefiant gas. Called also ethene, elayl, and formerly, bica…