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A device for measuring, or an instrument for indicating, energy expended or work done; a dynamometer. -- Er`go*met"ric (#), a.

An instrument for measuring the diameters of minute particles or fibers, from the size of the colored rings produced by the diffraction of the light in which the objects are viewed.

portant as revealing the molecular structure. -- Etching needle, a sharp-pointed steel instrument with which lines are drawn in the ground or varnish in etching. -- Etching stitch (Needlework), a stitch used outline embroidery.

An instrument for the volumetric measurement of gases; -- so named because frequently used to determine the purity of the air.

An instrument in which are combined the characteristic tones of the organ and various other instruments. [R.]

A bass instrument of the saxhorn family.

An instrument resembling the organ in tine and the upright piano in form. It is characterized by great strength and sweetness of tone.

taining to the Eustachian tube; as, Eustachian catheter. Eustachian catheter, a tubular instrument to be introduced into the Eustachian tube so as to allow of inflation of the middle ear through the nose or mouth. -- Eustrachian tube (Anat.), a passage from the tympanum of the ear to the pharynx. See Ear. -- Eustachi…

An instrument for ascertaining the quantity of a fluid evaporated in a given time; an atmometer.

To elevate the tone of, as of the voice or a musical instrument. Is. xxxvii. 23. Now Mars, she said, let Fame exalt her voice. Prior.

ct of excising or cutting out or off; extirpation; destruction. Such conquerors are the instruments of vengeance on those nations that have . . . grown ripe for excision. Atterbury.

One who executes or performs; esp., a performer on a musical instrument. Great executants on the organ. De Quincey.

To complete, as a legal instrument; to perform what is required to give validity to, as by signing and perhaps sealing and delivering; as, to execute a deed, lease, mortgage, will, etc.

The act of the mode of performing a work of art, of performing on an instrument, of engraving, etc.; as, the execution of a statue, painting, or piece of music. The first quality of execution is truth. Ruskin.

with on, upon, or in, referring to the subject of an experiment; with, referring to the instrument; and by, referring to the means; as, to experiment upon electricity; he experimented in plowing with ponies, or by steam power.

An instrument or agent causing explosion; an exploder; also, an explosive.

An instrument for measuring the extension of a body, especially for measuring the elongation of bars of iron, steel, or other material, when subjected to a tensile force.

A small, sharp-pointed instrument used in piercing eyelet holes; a stiletto.

The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. Collimating eyepiece. See under Collimate. -- Negative, or Huyghenian, eyepiece, an eyepiece consisting of two plano-convex lenses with their curved sur…

ural canal, such as the urethra, and produced usually by the unskillful introduction of instruments. -- False personation (Law), the intentional false assumption of the name and personality of another. -- False pretenses (Law), false representations concerning past or present facts and events, for the purpose of defr…