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An instrument for dividing the cornea in operations for cataract.

An instrument by means of which the bolt of a lock is shot or drawn; usually, a removable metal instrument fitted to the mechanism of a particular lock and operated by turning in its place.

Furnished with keys; as, a keyed instrument; also, set to a key, as a tune. Keyed bugle. See Kent bugle.

A primitive Chinese instrument of the cittern kind, with from five to twenty-five silken strings. Riemann.

An instrument for producing curves by the combination of circular movements; -- called also kinescope.

raph in which sounds appropriate to the scene are automatically uttered by the latter instrument.

A Chinese musical instrument, consisting of resonant stones or metal plates, arranged according to their tones in a frame of wood, and struck with a hammer.

An instrument consisting of a thin blade, usually of steel and having a sharp edge for cutting, fastened to a handle, but of many different forms and names for different uses; as, table knife, drawing knife, putty knife, pallet knife, pocketknife, penknife, chopping knife, etc.

One who, or that which, knocks; specifically, an instrument, or kind of hammer, fastened to a door, to be used in seeking for admittance. Shut, shut the door, good John ! fatigued, knocker; say I'm sick, I'm dead. Pope.

A reed instrument of music of the cornet kind, now obsolete (see Cornet, 1, a.)

(Mus.) A Turkish instrument of music, with a hollow body covered with skin, over which five strings are stretched. [Written also kussir.]

An instrument for measuring, and recording graphically, the pressure of the blood in any of the blood vessels of a living animal; -- called also kymographion.

An instrument for determining the amount of butter fat contained in a given sample of milk.

An instrument for estimating the purity or richness of milk, as a measuring glass, a specific gravity bulb, or other apparatus.

An instrument for estimating the amount of cream contained in milk by ascertaining its relative opacity.

An instrument for drawing the charge of a cannon.

A light-producing vessel, instrument or apparatus; especially, a vessel with a wick used for the combustion of oil or other inflammable liquid, for the purpose of producing artificial light.

An instrument which conveys the charge of a piece of ordnance and forces it home.

A surgical instrument of various forms, commonly sharp-pointed and two-edged, used in venesection, and in opening abscesses, etc.

The expression of ideas by writing, or any other instrumentality.