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metals; the art of separating metals from foreign matters, and determining the nature and quantity of metallic substances contained in any ore or mineral.

The quantity of medicine given, or prescribed to be taken, at one time.

To increase by adding an equal number, quantity, length, value, or the like; multiply by two; to double a sum of money; to double a number, or length. Double six thousand, and then treble that. Shak.

An instrument for augmenting a very small quantity of electricity, so as to render it manifest by sparks or the electroscope.

In twice the quantity; to twice the degree; as, doubly wise or good; to be doubly sensible of an obligation. Dryden.

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.

The quantity drawn in at once in drinking; a potion or potation. Disguise thyself as thou wilt, still, Slavery, . . . still thou art a bitter draught. Sterne. Low lies that house where nut-brown draughts inspired. Goldsmith.

A small piece or part; a small sum; a small quantity of money in making up a sum; as, the money was paid in dribblets. When made up in dribblets, as they could, their best securities were at an interest of twelve per cent. Burke.

The quantity of fluid which falls in one small spherical mass; a liquid globule; a minim; hence, also, the smallest easily measured portion of a fluid; a small quantity; as, a drop of water. With minute drops from off the eaves. Milton. As dear to me as are the ruddy drops That visit my sad heart. Shak. That drop of pe…

ps; the excrement or dung of animals. Dropping bottle, an instrument used to supply small quantities of a fluid to a test tube or other vessel. -- Dropping fire, a continued irregular discharge of firearms. -- Dropping tube, a tube for ejecting any liquid in drops.

An instrument for measuring the quantity of dew on the surface of a body in the open air. It consists of a balance, having a plate at one end to receive the dew, and at the other a weight protected from the deposit of dew.

A genus (Lemna) of small plants, seen floating in great quantity on the surface of stagnant pools fresh water, and supposed to furnish food for ducks; -- called also duckmeat.

cy of an engine, especially a steam pumping engine, as measured by work done by a certain quantity of fuel; usually, the number of pounds of water lifted one foot by one bushel of coal (94 lbs. old standard), or by 1 cwt. (112 lbs., England, or 100 lbs., United States).

A contrivance used to supply small quantities of sweetened liquid, water, etc., to any mixture, or to test tubes, etc.; a dropping bottle.

Eight times a quantity.

An instrument for measuring the quantity or intensity of electricity; also, sometimes, and less properly, applied to an instrument which indicates the presence of electricity (usually called an electroscope). Balance electrometer. See under Balance.

To cause to disappear from an equation; as, to eliminate an unknown quantity.

Act of causing a quantity to disappear from an equation; especially, in the operation of deducing from several equations containing several unknown quantities a less number of equations containing a less number of unknown quantities.

To swallow with greediness or in large quantities; to devour. Spenser.

To make gross, thick, or large; to thicken; to increase in bulk or quantity. [Obs.] Waves . . . engrossed with mud. Spenser. Not sleeping, to engross his idle body. Shak.