spider


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Related to spider: wolf spider

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

(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]
References in periodicals archive ?
Spiders typically start their invasion of homes from September through to October each year.
Unlike Spider-Man, spiders make their own natural silk in their bodies via special glands found in their abdomen.
Simon Garrett, from Bristol Zoological Society, said most spiders stay outside all year round, but mating season changes their behaviour.
According to the customs authorities, the seizure was made in the light of information that an attempt to smuggle spiders into Pakistan would be made.
Petillon J, Montaigne W and Renault D (2009) Hypoxic coma as a strategy to survive inundation in a salt-marsh inhabiting spider. Biology Letters 5, 442-445.
It wasn't until I watched it for the past few days I realised it wasn't your average spider.
Spiders are a species of arthropods called arachnids.
The money spider weaves hammock-shaped webs and bites its prey to paralyse it -- before wrapping it in silk and eating it.
The bite of the Sydney funnel web spider is potentially deadly, but no fatalities have occurred since the introduction of modern first-aid techniques and anti-venom, produced with the help of staff and funnel web spiders at the Australian Reptile Park like those shown in this video.
This is a female wolf spider and the little ones on her back are her children.
Clapping or other test sounds might confound the experiment by sending vibrations through equipment holding the spider. So the researchers did their neuron observations on a table protected from vibrations.