| arthrotyphoid | An obsolete term for typhoid fever with joint involvement due to metastatic infection. (05 Mar 2000) |
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| arthroxesis | Removal of diseased tissue from a joint by means of the sharp spoon or other scraping instrument. Origin: arthro-+ G. Xesis, a scraping (05 Mar 2000) |
| arthrozoic | <zoology> Of or pertaining to the Articulata; articulate. Origin: Gr. Joint + animal, fr. An animal. Source: Websters Dictionary (01 Mar 1998) |
| Arthus phenomenon | A form of immediate hypersensitivity resulting in erythema, oedema, haemorrhage, and necrosis observed in rabbits after injection of antigen to which the animal has already been sensitised and has specific IgG antibodies. The reaction is caused by the inflammation that results from the deposition of antigen-antibody complexes in tissue spaces and in blood vessel walls that activate complement, most of the damage seemingly being due to the polymorphonuclear leukocytes that phagocytise the deposits and release lysosomal enzymes. The phenomenon, described by Arthus, was in rabbits, but similar reactions (Arthus-type reactions) are observed in guinea pigs, rats, and dogs, as well as in humans. See: Arthus reaction. Synonym: Arthus reaction. (05 Mar 2000) |
| Arthus reaction | <dermatology, immunology> A localised inflammation due to injection of antigen into an animal that has a high level of circulating antibody against that antigen. A haemorrhagic reaction with oedema occurs due to the destruction of small blood vessels by thrombi. It may occur, as in Farmer's Lung, as a reaction to natural exposure to antigen. (18 Nov 1997) |
| Arthus, Nicolas | <person> French bacteriologist, 1862-1945. See: Arthus phenomenon, Arthus reaction. (05 Mar 2000) |
| arthus-type reaction's | Reaction's in man and other species that result from the same basic immunologic (allergic) mechanism which evokes, in the rabbit, the typical Arthus phenomenon. See: immune complex disease. (05 Mar 2000) |
| Arthur |
http://www.pbs.org/arthur/ Explore games and activities designed to help students at school and at home.
Ãâó: www.pbs.org/teachersource/thismonth/jul00/index3.s...
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| arthropod |
any of a group of animals having no backbone, a segmented body, jointed appendages that exist in pairs, and a body covering called an exoskeleton that is made of chitin; insects, crayfish, and spiders are some examples of arthropods
Ãâó: www.kentuckyawake.org/templates/glossary/
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| arthralgia |
Painful joints.
Ãâó: depts.washington.edu/registry/glossary.htm
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| arthritis |
Inflammation of joints.
Ãâó: depts.washington.edu/registry/glossary.htm
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| Arthur |
Arthur Eddington (1882-1945) was an English astronomer who first described the internal structure of a star. EGG NEBULA The Egg nebula (CRL2688) is a planetary nebula about 3,000 light-years from Earth. This huge cloud of dust and gas is expanding outwards at very high speeds. It was formed by a red giant star a few hundred years ago (this red giant was once a Sun-like star). Dust obscures our view of the star within.
Ãâó: www.enchantedlearning.com/subjects/astronomy/gloss...
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