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An instrument for showing visually the changes in a varying current; an oscillograph.

An instrument for recording the height of the liquid in an endosmometer or for registering osmotic pressures.

An instrument for measuring the amount of osmotic action in different liquids.

An instrument for performing osteoclasis.

An instrument for transmission of auditory vibrations through the bones of the head, so as to be appreciated as sounds by persons deaf from causes other than those affecting the nervous apparatus of hearing.

Assisting the sense of hearing; as, an otacoustic instrument.

An instrument to facilitate hearing, as an ear trumpet.

An instrument for exhibiting the repulsive action produced by light or heat in an exhausted vessel; a modification of the radoimeter. W. Crookes.

An instrument for examining the condition of the ear.

An instrument for ascertaining the amount of ozone in the atmosphere, or in any gaseous mixture. Faraday.

An instrument for measuring thickness, as of the glass of a mirror, or of paper; a pachymeter.

An instrument for obtaining directly, without calculation, the true bearing of the sun, and thence the variation of the compass

An instrument used to take up gold leaf from the pillow, and to apply it.

Of or relating to the god Pan. Pandean pipes, a primitive wind instrument, consisting of a series of short hollow reeds or pipes, graduated in length by the musical scale, and fastened together side by side; a syrinx; a mouth organ; -- said to have been invented by Pan. Called also Pan's pipes and Panpipes.…

An ancient musical instrument, of the lute kind; a bandore. [Written also pandoran.]

An instrument combining a compass, sundial, and universal time dial. Brande & C.

An instrument for copying plans, maps, and other drawings, on the same, or on a reduced or an enlarged, scale. [Written also pantagraph, and incorrectly pentagraph.] Skew pantograph, a kind of pantograph for drawing a copy which is inclined with respect to the original figure; -- also called plagiograph.…

An instrument for measuring angles for determining elevations, distances, etc.

A printed or written instrument; a document, essay, or the like; a writing; as, a paper read before a scientific society. They brought a paper to me to be signed. Dryden.

The perforation of a cavity of the body with a trocar, aspirator, or other suitable instrument, for the evacuation of effused fluid, pus, or gas; tapping.