leech


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Related to leech: Leech therapy

leech,

predacious or parasitic annelid worm of the class Hirudinea, characterized by a cylindrical or slightly flattened body with suckers at either end for attaching to prey. The leech, like other annelids, is segmented, but its numerous surface folds obscure the internal segments. In many forms the mouth has three small jaws equipped with sharp teeth. The digestive tract has lateral pouches that hold enough of the leech's staple food, blood, to last for months. The reproductive system is complex; leeches are hermaphroditic and cross-fertilizing. Nearly all leeches are aquatic, abounding in freshwater ponds in temperate regions, but they also are found in the tropics, in polar oceans, and in deserts. Some are permanent parasites of humans, horses, cattle, fish, and mollusks, but most are merely predatory. The salivary secretions of the leech contain hirudin, an anticoagulant, and other substances that promote blood flow. The medicinal leech (Hirudo medicinalis), a European freshwater leech once used by physicians to bleed patients suffering from almost any ailment, are now used to remove pooled blood from under skin grafts and other reconstructive surgeries, to treat bruises (such as black eyes), and to treat some osteoarthritis. Certain small leeches of the E Mediterranean region may enter the bodies of humans and animals through drinking water and lodge as parasites in the mouth or the respiratory passages. The giant Amazon leech can grow as large as the forearm of an adult human being. Leeches are classified in the phylum AnnelidaAnnelida
[Lat., anellus=a ring], phylum of soft-bodied, bilaterally symmetrical (see symmetry, biological), segmented animals, known as the segmented, or annelid, worms.
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, class Hirudinea.

leech

[lēch]
(invertebrate zoology)
The common name for members of the annelid class Hirudinea.

leech

1
1. any annelid worm of the class Hirudinea, which have a sucker at each end of the body and feed on the blood or tissues of other animals
2. an archaic word for physician

leech

2, leach
Nautical the after edge of a fore-and-aft sail or either of the vertical edges of a squaresail

leech

(networking)
Someone who downloads files but provides nothing for others to download. The term is common on BitTorrent, which relies on having multiple sources for files to improve download speed.

leech

A person who takes without giving. A free loader. See bandwidth leech and BitTorrent leech.

Leech

(dreams)
Leeches are parasites that drain your energy and your resources. They are literally “bloodsuckers” and what they represent from your life is up to you to determine. Think about all of the draining things around you or inside of you. Usually dreams are designed to make us more aware of ourselves. Thus, the leeches may represent your own habits, thoughts, and negative emotions rather than someone in your environment. In the old days (and maybe in some remote parts of the world this is still happening) leeches were used frequently for medical purposes. They were harvested and used in case of infection, when a poisonous or harmful substance needed to be removed from the body. Maybe the leeches in your dream are there to suck out all of the negativity that you acquire throughout your day or in a particular situation.
References in periodicals archive ?
Typically these are foods with a lot of water like vegetables and fruit, but you can add water to food to create the same effect, Leech explains, by making soup.
Nikonov, director of a leech farm, who got his start in a laboratory at Moscow State University, estimated that Russian leech farms produce 10 million specimens a year; his farm alone accounts for about two million.
tanae leech, Tan describes its features (without using epididymal or nephridial even once).
The court heard that Mr Leech, who was described by coroner Oliver Longstaffe as a "conscientious" car enthusiast, had failed to heed safety warnings that were written on the jack and in his c a r 's manual.
After qualifying in 1954, Mr Leech joined his uncles in their practices.
The court was told that another vehicle had followed Mr Leech in, and a gunman got out.
I don't think another death on our hands is what we need,'' Leech said, mimicking Fellowes -- who, despite asking, has yet to hear the canny impression.
Leech went over and unstrapped him, but was told by the boy's mother to leave him alone.
The saliva of leech contains a local anaesthetic which limits the sensation of host, enzymes and anti-aglutination substances such as hirudin (inhibits thrombin, factor IXa), antielastaze, antitripsine and antiplasmine which cause bleeding and anemia (El-Awad and Patil, 1990).
Results: The commonest mode of presentation of nasal leech was epistaxis (54.
Nassir Hakeem said patients are reacting positively to the leech therapy.