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Relating to a dynamometer, or to the measurement of force doing work; as, dynamometrical instruments.

ula and allied genera. -- Ear stones (Anat.), otoliths. See Otolith. -- Ear trumpet, an instrument to aid in hearing. It consists of a tube broad at the outer end, and narrowing to a slender extremity which enters the ear, thus collecting and intensifying sounds so as to assist the hearing of a partially deaf person.…

An instrument for removing wax from the ear.

An instrument for observing the boiling point of liquids, especially for determining the alcoholic strength of a mixture by the temperature at which it boils.

An instrument for intensifying sounds produced by percussion of the thorax. Knight.

An instrument intended to replace the knife in many operations, the parts operated on being severed by the crushing effect produced by the gradual tightening of a steel chain, so that hemorrhage rarely follows.

The thin cutting side of the blade of an instrument; as, the edge of an ax, knife, sword, or scythe. Hence, figuratively, that which cuts as an edge does, or wounds deeply, etc. He which hath the sharp sword with two edges. Rev. ii. 12. Slander, Whose edge is sharper than the sword. Shak.

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.

ed; 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.