| VT | tetrazolium violet; total ventilation; vacuum tube; vacuum tuberculin; vasotonin; venous thrombosis;... |
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| NFVVE | Normal Fullterm Vaginal Vacuum Extraction |
| AWG | American Wire Gauge |
| BPG | benzathine penicillin G; D-2,3-bisphosphoglycerate; blood pressure gauge; bypass graft |
| EMG | electromyogram, electromyography; eye movement gauge; exomphalosmacroglossia-gigantism [syndrome] |
| SGP | Strain gauge plethysmography |
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| MVA | Manual Vacuum Aspiration |
| V.A.C. | Vacuum Assisted Closure |
| V.E. | vacuum extraction |
| bite gauge | <instrument> A device for measuring biting pressure. Synonym: bite gauge, occlusometer. Origin: Gnatho-+ dynamometer (05 Mar 2000) |
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| Boley gauge | A caliper-type gauge graduated in millimeters used to measure the thickness of various dental materials. (05 Mar 2000) |
| gauge | 1. A measure; a standard of measure; an instrument to determine dimensions, distance, or capacity; a standard. "This plate must be a gauge to file your worm and groove to equal breadth by." (Moxon) "There is not in our hands any fixed gauge of minds." (I. Taylor) 2. Measure; dimensions; estimate. "The gauge and dimensions of misery, depression, and contempt." (Burke) 3. <machinery> Any instrument for ascertaining or regulating the dimensions or forms of things; a templet or template; as, a button maker's gauge. To measure the dimensions of, or to test the accuracy of the form of, as of a part of a gunlock. "The vanes nicely gauged on each side." (Derham) 4. <physics> Any instrument or apparatus for measuring the state of a phenomenon, or for ascertaining its numerical elements at any moment; usually applied to some particular instrument; as, a rain gauge; a steam gauge. 5. Relative positions of two or more vessels with reference to the wind; as, a vessel has the weather gauge of another when on the windward side of it, and the lee gauge when on the lee side of it. The depth to which a vessel sinks in the water. 6. The distance between the rails of a railway. The standard gauge of railroads in most countries is four feet, eight and one half inches. Wide, or broad, gauge, in the United States, is six feet; in England, seven feet, and generally any gauge exceeding standard gauge. Any gauge less than standard gauge is now called narrow gauge. It varies from two feet to three feet six inches. 7. The quantity of plaster of Paris used with common plaster to accelerate its setting. 8. To measure the capacity, character, or ability of; to estimate; to judge of. "You shall not gauge me By what we do to-night." (Shak) 9. That part of a shingle, slate, or tile, which is exposed to the weather, when laid; also, one course of such shingles, slates, or tiles. Gauge of a carriage, car, etc, the distance between the wheels; ordinarily called the track. Gauge cock, a stop cock used as a try cock for ascertaining the height of the water level in a steam boiler. Gauge concussion, an instrument for measuring the diameter of the bore of a cannon at any point of its length. Steam gauge, an instrument for measuring the pressure of steam, as in a boiler. Tide gauge, an instrument for determining the height of the tides. Vacuum gauge, a species of barometer for determining the relative elasticities of the vapor in the condenser of a steam engine and the air. Water gauge. A contrivance for indicating the height of a water surface, as in a steam boiler; as by a gauge cock or glass. The height of the water in the boiler. Wind gauge, an instrument for measuring the force of the wind on any given surface; an anemometer. Wire gauge, a gauge for determining the diameter of wire or the thickness of sheet metal; also, a standard of size. Origin: Written also gage. (20 Mar 1998) |
| gauge pressure | Pressure measured relative to ambient atmospheric pressure; at sea level, it is 1 atm less than the pressure in the atmosphere. Compare: absolute pressure. (05 Mar 2000) |
| catheter gauge | A metal plate with holes of graduated diameter used to determine the size of a catheter. (05 Mar 2000) |
| strain gauge | A device, employing the Wheatstone bridge principle, used for accurate measurement of forces such as strain, stress, or pressure. (05 Mar 2000) |
| undercut gauge | A device, used with a surveyor, to precisely locate areas for the placement of the retentive components of clasps when designing removable partial dentures. (05 Mar 2000) |
| vacuum | Origin: L, fr. Vacuus empty. See Vacuous. 1. <physics> A space entirely devoid of matter (called also, by way of distinction, absolute vacuum); hence, in a more general sense, a space, as the interior of a closed vessel, which has been exhausted to a high or the highest degree by an air pump or other artificial means; as, water boils at a reduced temperature in a vacuum. 2. The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.; as, a vacuum of 26 inches of mercury, or 13 pounds per square inch. Vacuum brake, a kind of continuous brake operated by exhausting the air from some appliance under each car, and so causing the pressure of the atmosphere to apply the brakes. <medicine> Vacuum pan, a glass tube provided with platinum electrodes and exhausted, for the passage of the electrical discharge; a Geissler tube. Vacuum valve, a safety valve opening inward to admit air to a vessel in which the pressure is less than that of the atmosphere, in order to prevent collapse. Torricellian vacuum. See Torricellian. Source: Websters Dictionary (01 Mar 1998) |
| vacuum casting | The casting of a metal in the presence of a vacuum. (05 Mar 2000) |
| vacuum curettage | Aspiration of the contents of the uterus with a vacuum curette. (12 Dec 1998) |
| vacuum desiccator | A desiccator that can be evacuated. (05 Mar 2000) |
| vacuum disk phenomenon | The appearance of a radiolucent stripe in an intervertebral disk, a manifestation of disk degeneration; a misnomer since there is gas present. (05 Mar 2000) |
| vacuum extraction, obstetrical | Removal of the foetus from the uterus or vagina at or near the end of pregnancy with a metal traction cup that is attached to the foetus' head. Negative pressure is applied and traction is made on a chain passed through the suction tube. (12 Dec 1998) |
| vacuum extractor | Device for producing traction upon the head of a foetus by means of a soft cup held by a vacuum. (05 Mar 2000) |
| vacuum flask | <apparatus> A glass vessel, often silvered, with two walls, the space between which is evacuated; used for maintaining materials at constant temperature or, more usually, at low temperature. Synonym: vacuum flask. (05 Mar 2000) |
| vacuum gauge | a gauge for indicating negative atmospheric pressure |
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