| 198AU | Radioactive Gold(used in interstitial radio theraphy) |
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| Au | Australia [antigen]; authorization; gold [Lat. aurum] |
| CG | cardiography; cardiogreen; choking gas; choriogenic gynecomastia; chorionic gonadotropin; chromogran... |
| GLAD | gold-labelled antigen detection |
| pAg | protein A-gold [technique] |
| gold | 1. <chemistry> A metallic element, constituting the most precious metal used as a common commercial medium of exchange. It has a characteristic yellow colour, is one of the heaviest substances known (specific gravity 19.32), is soft, and very malleable and ductile. It is quite unalterable by heat, moisture, and most corrosive agents, and therefore well suited for its use in coin and jewelry. Symbol Au (Aurum). Atomic weight 196.7. Native gold contains usually eight to ten per cent of silver, but often much more. As the amount of silver increases, the colour becomes whiter and the specific gravity lower. Gold is very widely disseminated, as in the sands of many rivers, but in very small quantity. It usually occurs in quartz veins (gold quartz), in slate and metamorphic rocks, or in sand and alluvial soil, resulting from the disintegration of such rocks. It also occurs associated with other metallic substances, as in auriferous pyrites, and is combined with tellurium in the minerals petzite, calaverite, sylvanite, etc. Pure gold is too soft for ordinary use, and is hardened by alloying with silver and copper, the latter giving a characteristic reddish tinge. [See Carat] Gold also finds use in gold foil, in the pigment purple of Cassius, and in the chloride, which is used as a toning agent in photography. 2. Money; riches; wealth. "For me, the gold of France did not seduce." (Shak) 3. A yellow colour, like that of the metal; as, a flower tipped with gold. 4. Figuratively, something precious or pure; as, hearts of gold. Age of gold. See Golden age, under Golden. Dutch gold, Fool's gold, Gold dust, etc. See Dutch, Dust, etc. Gold amalgam, a mineral, found in Columbia and California, composed of gold and mercury. Gold beater, one whose occupation is to beat gold into gold leaf. Gold beater's skin, the prepared outside membrane of the large intestine of the ox, used for separating the leaves of metal during the process of gold-beating. <zoology> Gold beetle See Cradle. Gold diggings, the places, or region, where gold is found by digging in sand and gravel from which it is separated by washing. Gold end, a fragment of broken gold or jewelry. Gold-end man. A buyer of old gold or jewelry. A goldsmith's apprentice. An itinerant jeweler. "I know him not: he looks like a gold-end man." . Gold fever, a popular mania for gold hunting. Gold field, a region in which are deposits of gold. Gold finder. One who finds gold. One who empties privies. Gold flower, a composite plant with dry and persistent yellow radiating involucral scales, the Helichrysum Stoechas of Southern Europe. There are many South African species of the same genus. Gold foil, thin sheets of gold, as used by dentists and others. See Gold leaf. <botany> Gold knobs or knoppes A small evergreen plant (Coptis trifolia), so called from its fibrous yellow roots. It is common in marshy places in the United States. Gold tissue, a tissue fabric interwoven with gold thread. Gold tooling, the fixing of gold leaf by a hot tool upon book covers, or the ornamental impression so made. Gold washings, places where gold found in gravel is separated from lighter material by washing. Gold worm, a glowworm. Jeweler's gold, an alloy containing three parts of gold to one of copper. Mosaic gold. See Mosaic. Origin: AS. Gold; akin to D. Goud, OS. & G. Gold, Icel. Gull, Sw. & Dan. Guld, Goth. Gulp, Russ. & OSlav. Zlato; prob. Akin to E. Yellow. See Yellow, and cf. Gild. Source: Websters Dictionary (01 Mar 1998) |
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| gold alloy | An alloy whose principal ingredient is gold, usually contains copper or platinum and silver; used in dentistry for restorations requiring considerable strength. (05 Mar 2000) |
| gold alloys | Alloys that contain a high percentage of gold. They are used in restorative or prosthetic dentistry. (12 Dec 1998) |
| gold casting | A casting made of gold, usually formed to represent and replace lost tooth structure. (05 Mar 2000) |
| gold colloid | A purplish suspension of minute particles of metallic gold, made by reducing a solution of bromauric acid or other acid or salt of gold. It is used as a probe in immunochemistry. (12 Dec 1998) |
| gold colloid, radioactive | <chemical> A radioactive suspension of minute particles of metallic gold, made by exposure to neutrons. It is used in the pleural cavity to treat lung cancer. Pharmacological action: antineoplastic agent, radiopharmaceuticals. (12 Dec 1998) |
| gold compound | <pharmacology> A group of medications which act to suppress inflammation in synovial tissue. Examples include gold sodium thiomalate, auranofin and aurothioglucose. These medications are indicated in the treatment of rheumatoid arthritis, psoriatic arthritis, Felty's syndrome and juvenile rheumatoid arthritis. (27 Sep 1997) |
| gold compounds | Inorganic compounds that contain gold as an integral part of the molecule. (12 Dec 1998) |
| gold equivalent | A unit of power of the protective colloids; the number of milligrams of protective colloid just sufficient to prevent the precipitation of 10 ml of a 0.0053 to 0.0058% gold solution by the action of 1 ml of a 10% sodium chloride solution. Synonym: gold number. (05 Mar 2000) |
| gold foil | Pure gold rolled into extremely thin sheets; used in the restoration of carious or fractured teeth. See: cohesive gold, noncohesive gold. (05 Mar 2000) |
| gold inlay | A gold restoration fabricated by casting in a mold made from a wax pattern; the restoration is sealed in the prepared cavity with dental cement. (05 Mar 2000) |
| gold isotopes | Stable gold atoms that have the same atomic number as the element gold, but differ in atomic weight. Au-197 is a stable isotope. (12 Dec 1998) |
| gold-myokymia syndrome | <syndrome> The symptom complex of widespread myokymia, muscle aching, and autonomic disturbances (excess sweating; orthostatic hypotension) that can result from gold therapy. (05 Mar 2000) |
| gold number | A unit of power of the protective colloids; the number of milligrams of protective colloid just sufficient to prevent the precipitation of 10 ml of a 0.0053 to 0.0058% gold solution by the action of 1 ml of a 10% sodium chloride solution. Synonym: gold number. (05 Mar 2000) |
| gold radioisotopes | Unstable isotopes of gold that decay or disintegrate emitting radiation. Au 185-196, 198-201, and 203 are radioactive gold isotopes. (12 Dec 1998) |