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To bring to pass; to effect; to achieve; to accomplish; to fulfill. A fit instrument to effectuate his desire. Sir P. Sidney. In order to effectuate the thorough reform. G. T. Curtis.

An instrument for copying drawings on the same or a different scale; a form of the pantograph.

An instrument for measuring the degree of rarefaction of air contained in the receiver of an air pump. [Spelt also elaterometer.]

An instrument used to change the direction of electric currents; a commutator. [R.]

An instrument for obtaining an accurate record of the time at which any observed phenomenon occurs, or of its duration. It has an electro-magnetic register connected with a clock. See Chronograph.

An instrument for measuring the strength of electro-dynamic currents.

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.

An instrument for producing sound by means of electric currents.

An instrument for exciting electricity, and repeating the charge indefinitely by induction, consisting of a flat cake of resin, shelllac, or ebonite, upon which is placed a plate of metal.

An instrument for detecting the presence of electricity, or changes in the electric state of bodies, or the species of electricity present, as by means of pith balls, and the like. Condensing electroscope (Physics), a form of electroscope in which an increase of sensibility is obtained by the use of a condenser.…

An instrument for describing ellipses; -- called also trammel.

as, an elliptical phrase. Elliptic chuck. See under Chuck. -- Elliptic compasses, an instrument arranged for drawing ellipses. -- Elliptic function. (Math.) See Function. -- Elliptic integral. (Math.) See Integral. -- Elliptic polarization. See under Polarization.

The mouthpiece of a wind instrument.

ollowed by in, about, on, or upon, and sometimes by to; as: (a) To make use of, as an instrument, a means, a material, etc., for a specific purpose; to apply; as, to employ the pen in writing, bricks in building, words and phrases in speaking; to employ the mind; to employ one's energies. This is a day in which the tho…

An instrument for examining the interior of the rectum, the urethra, and the bladder.

An instrument for measuring the force or amount of endosmotic action.

The instrument or deed by which one is invested with the fee of an estate.

Any instrument by which any effect is produced; especially, an instrument or machine of war or torture. "Terrible engines of death." Sir W. Raleigh.

Engines, in general; instruments of war. Training his devilish enginery. Milton.

To cut with a graving instrument in order to form an inscription or pictorial representation; to carve figures; to mark with incisions. Like . . . . a signet thou engrave the two stones with the names of the children of Israel. Ex. xxviii. 11.