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in zoology, organ found in bees, many wasps, some ants, and in scorpions and sting rays, used defensively as well as to kill or paralyze prey. In the bee and the wasp the venomvenom
or zootoxin,
any of a variety of poisonous substances produced by animals. In poisonous snakes, venom is secreted in two poison glands, one on each side of the upper jaw, and enters the fang by a duct.
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 is produced by glands associated with the ovipositor (egg-laying organ) of the female. As symptoms differ, it is assumed that the venom of each species of insect probably has slightly different chemical properties. The bee's "acid gland" produces histamine and proteinlike substances that are extremely dangerous to persons with specific allergies to them. Adrenaline injections may be lifesaving in such cases. In the honeybee the sting is a minute needle with tiny serrated edges, the teeth of which point backward. This makes it hard for the insect to pull the organ loose and often results in the fatal loss of the sting, the poison gland, and part of the intestine. Hornets, yellow jackets, and other wasps have sharp, smooth stings that can be used repeatedly. A few ants produce formic acid as a venom. The scorpion kills its prey with poison injected by a curved spine at the tip of its tail; the wound is painful to human adults and may be fatal to children. Strictly speaking, spiders bite rather than sting, since they inject their venom by means of fanglike cheliceras. Coelenterates, e.g., the hydra, jellyfish, and certain corals, are equipped with stinging capsules (nematocysts) consisting of a trigger mechanism that, when stimulated, raises the hydrostatic pressure of the cell so that hollow venom-bearing threads are ejected with enough force to pierce the prey. The larger coelenterates, e.g., the Portuguese man-of-war and Cyanea, are dangerous to man. The stingrays, or stingarees, have long whiplike tails bearing one to three sharply toothed, bony, poisonous stingers capable of inflicting painful wounds.
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1. a skin wound caused by the poison injected by certain insects or plants
2. pain caused by or as if by the sting of a plant or animal
3. a sharp pointed organ, such as the ovipositor of a wasp, by which poison can be injected into the prey
4. Slang a trap set up by the police to entice a person to commit a crime and thereby produce evidence
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


A parallel dialect of Scheme intended to serve as a high-level operating system for symbolic programming languages. First-class threads and processors and customisable scheduling policies.

E-mail: <>.

["A Customizable Substrate for Concurrent Languages", S. Jagannathan et al, ACM SIGPLAN Notices, 1992].
This article is provided by FOLDOC - Free Online Dictionary of Computing (
References in periodicals archive ?
Rock star Sting's wife Trudie Styler gave Mr Goldsmith PS4,000 in 2010.
Events include Wallsend Local History walk, giving an insight into rock star Sting's time in Wallsend, the Historic Tynemouth Local History Walk and 'The Geordie Lamp',' which will be a celebration of the Stephenson Legacy at the White Swan Centre, in Killingworth.
London, June 5 ( ANI ): Pop star Sting is set to release his first full-length album of original material since 2003.
"I am not old enough to be Sir" - Pop star Sting, 60, on why he has not received a knighthood.
POP star Sting has revealed he and his wife Trudie now get their kicks by dressing up for sex.
ROCK star Sting blasted the X Factor yesterday, claiming the reality TV show had "put music back decades" and was little more than "televised karaoke".
More famously rock star Sting has released an album in 2006, of mostly Dowland material on his Songs from the Labyrinth CD.
Rock star Sting cancelled his show in his home city last night because of a throat infection.
British star Sting received the Century Award for creative achievement.
THE brother in law of rock star Sting has spoken of his relief after being released from a 10- week kidnap ordeal in war ravaged Angola.
A small plane carrying British rock star Sting skidded off the runway while trying to land at Florence airport yesterday.
Pop star Sting, who will |be in South Shields today