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spider |
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spider /spi·der/ (spi´der)
1. an arthropod of the class Arachnida. 2. vascular s. arterial spider vascular s. black widow spider a spider, Latrodectus mactans, whose bite causes severe poisoning. vascular spider a telangiectasis caused by dilatation and ramification of superficial cutaneous arteries, appearing as a bright red central area with branching rays somewhat resembling a spider; commonly associated with pregnancy and liver disease.
Spider A term of art referring to a thing likened to a spider, either morphologically, or functionally Dermatology See Spider angioma Entomology A chelicerate arthropod of the class Arachnida, which has 8 legs, a cephalothorax, a smooth, round abdomen, and equipment for spinning webs; 2 spiders are of medical importance in the US: Latrodectus mactans, the black widow spider, and Loxosceles reclusa, the North American brown recluse spider Online A software program that resides in a PC and, when launched, crawls the Web for requested information, searching for keywords in the title or text of digitalised documents, simultaneously scanning entire libraries of documents, and tracking down millions of cross-references; when finished, the spider ranks the files in order of probable relevance spider [spi´der] 1. an arthropod of the class Arachnida. 2. vascular spider. spider bite in the United States, the two spiders whose bites are most likely to cause a serious reaction are the black widow spider(Latrodectus mactans) and the brown recluse spider(Loxosceles reclusa). Signs and symptoms are associated with the effects of injection of the venom and include pain at the injection site, weakness, muscle pain and cramps, elevated blood pressure, and restlessness. Bites by these spiders must be treated promptly and effectively. First aid is the same as that for a snakebite and includes the following: 1. Wash the wound with soap and water and apply a clean dressing. 2. Apply a constricting band between the area of the bite and the heart. 3. Keep the person calm and transport him to the hospital or medical facility as soon as possible. 4. If swelling becomes apparent, apply a cold compress to the area. black widow spider Latrodectus mactans, a poisonous spider found in North America; see spider bite. brown recluse spider Loxosceles reclusa, a poisonous spider found in North America; see spider bite. vascular spider a telangiectasis due to dilatation and branching of superficial cutaneous arteries, which presents as a bright red central portion with branching radiations, the whole somewhat resembling the configuration of a spider. The lesions may occur singly or in large numbers, and may be nevoid or acquired, being commonly associated with pregnancy and liver disease. Called also nevus araneus, spider nevus, and spider telangiectasia.
spider an arthropod of the class Arachnida. black widow spider see latrodectus mactans. brown recluse spider a poisonous spider, Loxoceles reclusa, whose bite causes severe poisoning in humans. spider lily see crinum. trapdoor spider Atrax robustus. Called also funnel-web spider. spider grass brachyachneconvergens. spider lamb syndrome
inherited arachnomelia. spider Dermatology See Spider angioma Entomology A chelicerate arthropod of the class Arachnida, which has 8 legs, a cephalothorax, a smooth, round abdomen, and equipment for spinning webs; 2 spiders are of medical importance in the US:
Lactrodectus mactans, the black widow spider and Loxosceles reclusus, the North American brown recluse spider. See Black widow spider, Brown recluse spider. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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