For Virus we have terms and definitions in 40 topics. The topics are Agriculture, Baby, Biology, Biotechnology, Blood and Marrow Transplant, Cancer, Canine, Computer Technology, Dairy Production, Digital Imaging, Disease, E-Learning, Evolution, Fertility, Food, Food and Health, Genetics and Food, Genetics and Genealogy, Genome, HIV and AIDs, Hepatitis C, Human Body, Huntingtons Disease, Immunization, Information Security, Information Warfare, Internet, Legal, Mesothelioma, Lymphoma, Medical, Microbiology, Networking, Nutrition, Photography, Physical Geography, Prostate Cancer, Sanitation, Sexually Transmitted Diseases, Spyware and Technology.

Virus (Agriculture)

A group of submicroscopic infective agents that are considered nonliving complex molecules.

Virus (Baby)

A virus is any of a group of microscopic agents that cause disease in humans, animals, or plants. Unlike bacterial infections, viral infections cannot be treated with antibiotics; vaccines or immunizations, such as those against polio, are helpful in fending off many viruses.

Virus (Biology)

Fragments of nucleic acid surrounded by a protein coat; may attack cells and replicate within the cells, destroying them.

Virus (Biotechnology)

An infectious agent that requires a host cell to replicate. Viruses are usually composed of an RNA or DNA molecule wrapped in a protein coat. Sometimes, viruses are used as vectors.

Virus (Blood and Marrow Transplant)

Tiny micro-organism that invades cells, alters their genetic machinery, and turns them into factories for production of more of the virus

Virus (Cancer)

Tiny particles, much smaller than cells, which usually consist only of a DNA genome and protein coat. They infect host cells and multiply rapidly once inside, causing disease. Many common diseases, such as the common cold, warts and 'flu are caused by viruses. Some, such as a few strains of human papillomavirus are linked to cancer.

Virus (Canine)

Any of various simple submicroscopic parasites of plants, animals, and bacteria that often cause disease and that consist essentially of a core of RNA or DNA surrounded by a protein coat. Unable to replicate without a host cell, viruses are typically not considered living organisms.

Virus (Computer Technology)

A program that often has an incubation period, is infectious, and is intended to cause damage. A virus program might destroy data and programs or damage a disk drive's boot sector. For example, a Trojan horse or worm are both different forms of viruses.

Virus (Dairy Production)

One of the most elementary forms of life consisting of genetic material surrounded by a protein coat, having the ability to replicate only inside a living cell and cause disease in more complex organisms.

Virus (Digital Imaging)

A computer program written by pranksters bent on vandalism for the expressed purpose of destroying computer files in any computer memory into which the virus may be inadvertently introduced. Also a term applied to a corrupted program.

Virus (Disease)

An infectious agent made of protein and genetic material. It is not made of a cell and must invade another cell to reproduce.

Virus (E-Learning)

A destructive type of computer program that attempts to disrupt the normal operation of a computer, rewrite or delete information from storage devices, and in some cases, cause physical damage to the computer.

Virus (Evolution)

A kind of intracellular parasite that can replicate only inside a living cell. In its dispersal stage between host cells, a virus consists of nucleic acid that codes for a small number of genes, surrounded by a protein coat. (Less formally, according to Medawar's definition, a virus is "a piece of bad news wrapped in a protein.")

Virus (Fertility)

A microscipic infectious organism that reproduces inside living cells

Virus (Food)

A simple, noncellular particle (entity) that can reproduce only inside living cells (of other organisms). e simple structure of viruses is their most important characteristic. st viruses consist only of a genetic material—either DNA or RNA—and a protein coating. ruses are “alive” in that they can reproduce themselves, but they have none of the other characteristics of living organisms. ruses cause a large variety of significant diseases in plants and animals, including humans.

Virus (Food and Health)

A simple, noncellular particle (entity) that can reproduce only inside living cells (of other organisms). The simple structure of viruses is their most important characteristic. Most viruses consist only of a genetic material—either DNA or RNA—and a protein coating. Viruses are “alive” in that they can reproduce themselves, but they have none of the other characteristics of living organisms. Viruses cause a large variety of significant diseases in plants and animals, including humans.

Virus (Genetics and Food)

A tiny organism composed of a core of nucleic acid usually encased in a protein. A virus hasn't its own nucleus and so has none of the 'molecular machinery' to live. Viruses are capable of infecting living cells, where they take over the 'molecular machinery' inside the nucleus of their host. They are characterised by their total dependence upon a living host, and only multiply within the living cells of the host.

Virus (Genetics and Genealogy)

A molecular biological entity that can reproduce only within a host cell. Viruses consist of nucleic acid covered by protein. Some animal viruses are also surrounded by a membrane. Inside the infected cell, the virus uses the synthesizing capability of the host cell to produce progeny virus.

Virus (Genome)

A noncellular biological entity that can reproduce only within a host cell. Viruses consist of nucleic acid covered by protein; some animal viruses are also surrounded by membrane. Inside the infected cell, the virus uses the synthetic capability of the host to produce progeny virus.
See also: cloning vector

Virus (HIV and AIDs)

A particle containing genetic inform`ation and therefore able to reproduce. Its genes may be in the form of DNA or RNA (see "Retrovirus"). Technically, a virus is not a living organism, because it cannot reproduce without infecting living cells. It is notoriously difficult to design drugs that effectively treat viruses.

Virus (Hepatitis C)

A sub-microscopic life form that uses host cells - bacteria, plant cells, or even human body cells to reproduce itself. A virus normally consists of a small amount of genetic material (which it uses to reproduce itself) and a protective coat. Viruses are very small - most human viruses are less than 150 nanometers in diameter. (A nanometer is one billionth of a meter).

Virus (Human Body)

an infectious agent of small size and simple composition that can multiply only in the living cells of animals, plants or bacteria. In the strictest sense, viruses should not be considered organisms, because they are not free-living: they cannot reproduce and carry on metabolic processes without a host cell.

Virus (Huntingtons Disease)

An intracellular parasite that depends on the host cell machinery to manufacture copies of itself. Viruses are not living organisms.

Virus (Immunization)

A tiny organism that multiplies within cells and causes disease such as chickenpox, measles, mumps, rubella, pertussis and hepatitis. Viruses are not affected by antibiotics, the drugs used to kill bacteria.

Virus (Information Security)

A computer virus is a block of executable code that would replicate itself by attaching to other files or replacing another program.

Virus (Information Warfare)

A self-replicating program that is hidden in another piece of computer code, such as an email.

Virus (Internet)

A program that can modify other programs by embedding a copy of itself in them or changing their function, often with disasterous results.

Virus (Legal, Mesothelioma)

Very small organisms that cause infections. Viruses are too small to be seen with a regular microscope. They reproduce only in living cells.

Virus (Lymphoma)

Microscopic organisms that cause infectious disease. In cancer therapy, some viruses may be made into vaccines that help the body build an immune response to and kill tumor cells.

Virus (Medical)

The smallest known disease-causing microorganism; viruses are very simple in structure and can only multiply when they are inside the cell of another organism

Virus (Microbiology)

A noncellular biological entity that can reproduce only within a host cell. Viruses consist of nucleic acid covered by protein; some animal viruses are also surrounded by membrane. Inside the infected cell, the virus uses the synthetic capability of the host to produce progeny virus.

Virus (Networking)

A computer virus is a small program designed to corrupt and/or alter the operation of other legitimate programs.

Virus (Nutrition)

Any of a vast group of minute, often disease-causing, structures composed of a protein coat and a core of DNA and/or RNA. Because they are incapable of reproducing on their own (they must reproduce inside the cell of an infected host), viruses are not technically considered living organisms. Unlike bacteria, viruses are not affected by antibiotics.

Virus (Photography)

Describes a part of a computer program that automatically duplicates itself, usually resulting in the damage or destruction of software and/or data. A virus can make a computer "crash".

Virus (Physical Geography)

Is a fragment of DNA or RNA that depends on the infection of host cells for their reproduction. They are not cells. Viruses are thought to parts of the genetic code found in either eukaryote or prokaryote cells that have the ability to exist on their own. At times viruses are metabolically inert and technically non-living.

Virus (Prostate Cancer)

Ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein

Virus (Sanitation)

The smallest organism capable of producing infection and diseases in man or other species. They are intercellular parasitic organisms that cause host cells to manufacture virus particles. The cell eventually dries and bursts resulting in the release of thousands of new virus particles that can infect other healthy cells.

Virus (Sexually Transmitted Diseases)

A kind of germ that is so small it can't even be seen with a regular microscope. Some VIRUSES can be prevented by VACCINES. VIRUSES are the smallest and simplest of all germs, but they are also some of the deadliest. A STD caused by a VIRUS can not be cured, but it can be treated to help make the symptoms disappear. Herpes and HIV are two STDs that are caused by VIRUSES. Viruses also cause the flu, chicken pox, and malaria.

Virus (Spyware)

Software which attaches to other software. A boot virus inserts its code into the boot record or master boot record of a disk, so that when the machine boots from that disk, the virus code is executed. A file virus inserts its code into an executable file, so that when that file is executed, the virus is executed as well. • Annual Growth

Virus (Technology)

An intrusive program that infects computer files by inserting in those files copies of itself. The copies are usually executed when the file is loaded into memory, allowing them to infect still other files, and so on. Viruses often have damaging side effects--sometimes intentionally, sometimes not. For example, some viruses can destroy a computer's hard disk or take up memory space that could otherwise be used by programs. See also Good Times virus, Trojan horse, worm.

Similar

Browse words that start with:

• Vi
• Vir
• Virus

Browse All Terms by First Letter

Term Search