| VT | tetrazolium violet; total ventilation; vacuum tube; vacuum tuberculin; vasotonin; venous thrombosis;... |
|---|---|
| ult | ultimate |
| UTS | Ullrich-Turner syndrome; ulnar tunnel syndrome; ultimate tensile strength |
| NFVVE | Normal Fullterm Vaginal Vacuum Extraction |
| VA | vacuum aspiration; valproic acid; vasodilator agent; ventricular aneurysm; ventricular arrhythmia; v... |
| U.T.S. | ultimate tensile strength |
|---|---|
| MVA | Manual Vacuum Aspiration |
| V.A.C. | Vacuum Assisted Closure |
| V.E. | vacuum extraction |
| ultimate | 1. Farthest; most remote in space or time; extreme; last; final. "My harbor, and my ultimate repose." (Milton) "Many actions apt to procure fame are not conductive to this our ultimate happiness." (Addison) 2. Last in a train of progression or consequences; tended toward by all that precedes; arrived at, as the last result; final. "Those ultimate truths and those universal laws of thought which we can not rationally contradict." (Coleridge) 3. Incapable of further analysis; incapable of further division or separation; constituent; elemental; as, an ultimate constituent of matter. <chemistry> Ultimate analysis, organic analysis. See Organic. Ultimate belief. See Belief. <mathematics> Ultimate ratio, the limiting value of a ratio, or that toward which a series tends, and which it does not pass. Synonym: Final, conclusive. See Final. Origin: LL. Ultimatus last, extreme, fr. L. Ultimare to come to an end, fr. Ultimus the farthest, last, superl. From the same source as ulterior. See Ulterior, and cf. Ultimatum. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| ultimate analysis | A description of a fuel's elemental composition as a percentage of the dry fuel weight. (05 Dec 1998) |
| ultimate principle | One of the chemical elements. (05 Mar 2000) |
| ultimate strength | The maximum stress achieved prior to failure of a component on a single application of the load. (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 headache | Headache due to closure of the frontal sinus. (05 Mar 2000) |
| vacuum pan | A device for growing crystals from solutions by gradually lowering the pressure within the sealed container holding the liquid. (09 Oct 1997) |
| vacuum tube | A glass tube from which the air has been removed, containing two or more electrodes, between which passes an electrical current or spark; used in the production of X-rays, or to control circuits. Previously in wide use, the vacuum tube has been supplanted by transistors in electronic circuits. (05 Mar 2000) |
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