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spider

 [spi´der]
1. an arthropod of the class Arachnida.
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.

spi·der

(spī'dĕr),
1. An arthropod of the order Araneida (subclass Arachnida) characterized by four pairs of legs; a cephalothorax; a globose, smooth abdomen; and a complex of web-spinning spinnerets. Among the venomous spiders found in the New World are the black widow spider, Latrodectus mactans; red-legged widow spider, Latrodectus bishopi; pruning spider, or Peruvian tarantula, Glyptocranium gasteracanthoides; Chilean brown spider, Loxosceles laeta; Peruvian brown spider, Loxosceles rufipes; brown recluse spider of North America, Loxosceles reclusus.
2. An obstructive growth in the teat of a cow.
[O. E. spinnan, to spin]

spider

/spi·der/ (spi´der)
1. an arthropod of the class Arachnida.

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

(spī′dər)
n.
Any of numerous arachnids of the order Araneae, having a body divided into a cephalothorax and an abdomen, eight legs, two chelicerae that bear venom glands, and two or more spinnerets that produce the silk used to make nests, cocoons, or webs for trapping insects.
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

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.

spi·der

(spī'dĕr)
1. An arthropod of the order Araneida characterized by having four pairs of legs; a cephalothorax; a globose, smooth abdomen; and a complex of spinnerets, which build the web. Among the venomous spiders are the black widow spider, Latrodectus mactans, and the brown recluse spider, Loxosceles reclusus.
2. Synonym(s): spider angioma.
[O. E. spinnan, to spin]

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.
References in periodicals archive ?
The SPDR Russell 1000[R] Low Volatility ETF seeks to track the performance of the Russell 1000[R] Low Volatility Index.
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We now have over $22 billion in assets in DIAMONDS, SPDRs, WEBS and others, and they contribute about 40% to 50% of the total trading volume of the exchange," says Jay Baker, vice president of marketing for the AMEX.
The launch of the SPDR S&P 500 ETF in 1993 was a groundbreaking innovation that improved access to the market for investors," said James Ross, senior managing director and global head of SPDR Exchange Traded Funds at SSgA.
SPDR ETFs are a comprehensive family spanning an array of international and domestic asset classes and are managed by SSGA Funds Management Inc, a registered investment adviser and wholly owned subsidiary of State Street Corporation.
State Street manages $307 billion in SPDR ETF assets worldwide (as of March 31, 2012)** and is one of the largest ETF providers in the US and globally.
We take pride in working closely with our clients to develop precise investment strategies, including our pioneering family of SPDR ETFs.
SPDR ETFs are a family spanning an array of international and domestic asset classes.
BOSTON -- State Street Global Advisors (SSgA)*, the asset management business of State Street Corporation (NYSE: STT), today announced that the SPDR S&P 1500 Value Tilt ETF (Symbol: VLU) and the SPDR S&P 1500 Momentum Tilt ETF (Symbol: MMTM) began trading on the NYSE Arca on October 25, 2012.
The SPDR BofA Merrill Lynch Crossover Corporate Bond ETF seeks to track the performance of the BofA Merrill Lynch US Diversified Crossover Corporate Index.
BOSTON -- State Street Global Advisors (SSgA)*, the asset management business of State Street Corporation (NYSE: STT), today announced that the SPDR([R]) SSgA Multi-Asset Real Return ETF (Symbol: RLY), the SPDR SSgA Income Allocation ETF (Symbol: INKM), and the SPDR SSgA Global Allocation ETF (Symbol: GAL) began trading on the NYSE Arca on April 26, 2012.
to offer SPDR ETF investments to American families looking to enhance their college savings strategies," said James Ross, senior managing director and global head of SPDR Exchange Traded Funds at State Street Global Advisors.