worm(redirected from Antigens, helminth)
Also found in: Dictionary, Thesaurus, Medical.
worm, common name for various unrelated invertebrate animals with soft, often long and slender bodies. Members of the phylum Platyhelminthes, or the flatworms, are the most primitive; they are generally small and flat-bodied and include the free-living planarians (of the class Turbellaria) as well as the parasitic flukes (class Trematoda) and tapeworms (class Cestoda). The nemertines, or ribbon worms (phylum Nemertinea), are often colorful marine carnivores with an extensible proboscis. The smallest species are only a fraction of an inch (less than 2.5 cm) long, while giants of the group range up to 90 ft (27 m) and are the longest of all invertebrates. Pseuodcoelomate worms include those in the phyla Rotifera, Gastrotricha, Kinorhyncha, Nematoda, and Nematomorpha. Of these, the largest phylum is the nematodes, which are probably the most numerous multicellular animals. Also called roundworms and threadworms, the nematodes include widespread free-living species as well as parasites, such as the hookworm. Other parasitic nematodes include Filaria, the cause of filariasis, which may result in elephantiasis; Trichinella, the cause of trichinosis; Ascaris, an intestinal parasite of humans, horses, and pigs; the pinworm, a parasite common in children; the Guinea worm, Dracunculus medinensis, which is ingested as a larva in water and slowly emerges when full grown (up to 3 ft/91 cm) through a painful sore in the skin, but as a result of an eradication program is now found only in Chad, Ethiopia, and South Sudan; and various other species that are agricultural pests. Like the nematodes, the hairworms, or horsehair worms, are unsegmented, but they are grouped separately in the phylum Nematomorpha. The larvae are parasitic, first in the bodies of aquatic insects and then within grasshoppers or beetles. The adult is about 6 in. (15 cm) long and covered with brown chitin, giving it a stiff appearance; since the worms were frequently found in watering troughs, superstition had it that they developed from horsehairs. The annelid worms (phylum Annelida) have segmented bodies, distinct heads, digestive tubes, circulatory systems, and brains. Appendages on each segment are used for walking or swimming. They include the earthworm, of the class Oligochaeta, the leech (class Hirudinea), and the marine annelids of the class Polychaeta. The sea mouse, the clam worm, and the feather duster worm belong to the latter group. The shipworm is a type of clam. The larvae of many insects are popularly called worms. Moth and butterfly larvae can be distinguished from adult animals called worms by the presence of several pairs of fleshy appendages at the rear end of the body (see caterpillar). However, other insect larvae are completely legless, while still others are equipped with six pairs of legs, as in adult insects (see larva). Insect larvae known as worms include the armyworm, bagworm, cutworm, and inchworm.
The Columbia Electronic Encyclopedia™ Copyright © 2022, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
What does it mean when you dream about a worm?
The term worm is used metaphorically in some common English expressions to represent weakness and sneakiness, as in “he wormed his way into the group” or “what a worm he turned out to be.” The worm also symbolizes bait and rich, fertile soil.
The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.
A computer program that seeks to replicate itself and to spread, with the goal of consuming and exhausting computer resources, thereby causing computing systems to fail.
A shank having at least one complete tooth (thread) around the pitch surface; the driver of a worm gear.
The common name for members of the Annelida.
Any of various elongated, naked, soft-bodied animals resembling an earthworm.
Sweat of molten metal which exudes through the crust of solidifying metal in a casting, and is caused by gas evolution.
Pertaining to a storage device, such as an optical disk, that allows the user to record data only once and to read back the data an unlimited number of times. Abbreviation for write-one, read-many.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. any of various invertebrates, esp the annelids (earthworms, etc.), nematodes (roundworms), and flatworms, having a slender elongated body
2. any of various insect larvae having an elongated body, such as the silkworm and wireworm
3. any of various unrelated animals that resemble annelids, nematodes, etc., such as the glow-worm and shipworm
4. a shaft on which a helical groove has been cut, as in a gear arrangement in which such a shaft meshes with a toothed wheel
5. a spiral pipe cooled by air or flowing water, used as a condenser in a still
6. a nontechnical name for lytta
7. Anatomy any wormlike organ, structure, or part, such as the middle lobe of the cerebellum (vermis cerebelli)
8. Computing a program that duplicates itself many times in a network and prevents its destruction. It often carries a logic bomb or virus
write once read many times: an optical disk that enables users to store data but not change it
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
(From "Tapeworm" in John Brunner's novel "The Shockwave Rider", via XEROX PARC) A program that propagates itself over a network, reproducing itself as it goes. Compare virus. Nowadays the term has negative connotations, as it is assumed that only crackers write worms.
Perhaps the best-known example was the Great Worm.
Compare Trojan horse.
Perhaps the best-known example was the Great Worm.
Compare Trojan horse.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
worm(1) A destructive program that replicates itself internally or throughout the network. A worm can do damage by sheer volume, consuming internal storage and memory resources or by exhausting network bandwidth. It can also deposit Trojans that turn every computer in the network into zombies for spam, denial of service (DOS) or some other malicious attack. Very often, the terms "worm" and "virus" are used synonymously; however, worm implies automatic reproduction. See virus, logic bomb, smartphone virus, denial-of-service attack, spam, Stuxnet, Worm.ExploreZip virus and Morris worm.
(2) (worm) A program that moves through a network and deposits data at each node for diagnostic purposes. A worm may cause idle computers to share some of the processing workload. See ethical worm.
(3) (WORM) (Write Once Read Many) A magnetic tape format that can prevent recorded files from being erased or rewritten. See LTO.
(4) (WORM) (Write Once Read Many) There are two kinds of optical drive technologies that prevent files from being rewritten. The traditional ablative WORM makes a permanent change in the recording material. Continuous composite write (CCW) is a WORM mode in a normally rewritable magneto-optical (MO) cartridge. The drive's firmware ensures that recorded areas on the medium are not rewritten. See optical disc and MDISC.
|Large-format 12-14" WORM drives use the ablative technology; however, magneto-optic (MO) drives have firmware that turns MO media into write-once disks.|
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
What thoughts come to mind when someone is called a worm? When we are dreaming about these animals, we may be reflecting on the more negative aspects of our own or someone else’s personality. Worms are usually associated with weakness and sneakiness. They are blind and generally feed on decaying matter. To associate these characteristics with any individuals, including yourself, indicates that you are seeing a very negative side of them and have a generally low opinion of them (or yourself). If you are dreaming about earthworms, the connotation is more positive because they make contributions to the general health of our environment. Old superstition-based dream interpretations say that dreaming about worms is a warning about poor health.
Bedside Dream Dictionary by Silvana Amar Copyright © 2007 by Skyhorse Publishing, Inc.