gold

gold
A yellow metallic element, atomic no. 79, atomic wt. 196.96654; 198Au (half-life of 2.694 days) is used in the treatment of certain tumors, for radiation synovectomy, and in imaging. SYN: aurum.
- cohesive g. nearly pure g. so treated as to be free of adsorbed surface gases and impurities so that it will weld under pressure at room temperature; in dentistry, used as a restorative material placed directly into a prepared cavity and welded by pressure.
- mat g. powdered g. formed by electrolytic precipitation, compressed into strips, and sintered.
- noncohesive g. g. that will not weld because gases adsorb to the surface; some forms may be made cohesive by heat treatment; in dentistry, used as a direct filling material.
- powdered g. g. formed by atomizing or by chemical precipitation, lightly precondensed, and wrapped with g. foil so as to form pellets.
- g. sodium thiomalate used in the treatment of rheumatoid arthritis. SYN: sodium aurothiomalate.
- g. sodium thiosulfate used in the treatment of lupus erythematosus and some cases of rheumatoid arthritis. SYN: sodium aurothiosulfate.
- g. standard term used to describe a method or procedure that is widely recognized as the best available. [jargon]
- g. thioglucose SYN: aurothioglucose.
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Global Initiative on Obstructive Lung Disease

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gold 'gōld n, often attrib a malleable ductile yellow metallic element that occurs chiefly free or in a few minerals and is used esp. in coins, jewelry, and dentures and in the form of its salts (as gold sodium thiomalate) esp. in the treatment of rheumatoid arthritis symbol Au see ELEMENT (table)

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n.
1. a bright yellow metal that is very malleable. In dentistry pure gold is very occasionally used as a filling. Alloys are used for crown, inlay, and bridge, either alone or veneered with a tooth-coloured material. Gold alloys are now only rarely used as the metal frame-work for partial dentures, cobalt-chromium alloys being used instead.
2. (in pharmacology) any of several compounds of the metal gold, used in the treatment of rheumatoid arthritis. Sodium aurothiomalate (Myocrisin) is administered by intramuscular injection. Common side-effects include mouth ulcers, itching, blood disorders, skin reactions, and inflammation of the colon and kidneys. auranofin is a gold compound administered orally.

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(Au) (gōld) a yellow metallic element, atomic number 79, atomic weight 196.967, specific gravity 19.32. When alloyed, in carats, pure gold has 24 parts (or carats). Gold compounds are used in medicine, chiefly in arthritis (see chrysotherapy). However, all the compounds are poisonous; see also chrysiasis and chrysoderma.

Medical dictionary. 2011.


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