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Virus - Wikipedia
A virus is a small infectious agent that replicates only inside the living cells of other organisms.Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants, and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898 ...
Virus | definition of virus by Medical dictionary
virus [vi´rus] any member of a unique class of infectious agents, which were originally distinguished by their smallness (hence, they were described as “filtrable” because of their ability to pass through fine ceramic filters that blocked all cells, including bacteria) and their inability to replicate outside of and without assistance of a living ...
virus | Definition, Structure, & Facts | Britannica.com
Virus: Virus, an infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria.
What is a computer virus? - NORTON™ - Antivirus Software ...
A computer virus, much like a flu virus, is designed to spread from host to host and has the ability to replicate itself. Similarly, in the same way that flu viruses cannot reproduce without a host cell, computer viruses cannot reproduce and spread without programming such as a file or document.
Virus - Free downloads and reviews - CNET Download.com
virus free download - Virus, Virus Chaser, Shortcut Virus Remover, and many more programs
Virus | Definition of Virus by Merriam-Webster
Is the illness caused by bacteria or a virus? I think I have the virus that's going around this winter. The software checks your hard drive for viruses.
Virus - definition of virus by The Free Dictionary
2. A computer program or series of commands that can replicate itself and that spreads by inserting copies of itself into other files or programs which users later transfer to other computers.
Virus - Simple English Wikipedia, the free encyclopedia
A virus is a microscopic parasite which can infect living organisms and cause disease. It can make copies of itself inside another organisms cells. Viruses consist of nucleic acid + a protein coat. Usually the nucleic acid is RNA; sometimes it is DNA.. Viruses reproduce by getting their nucleic acid strand into a prokaryote or eukaryote cell. The RNA or DNA strand then takes over the cell ...
Virus | Define Virus at Dictionary.com
Virus definition, an ultramicroscopic (20 to 300 nm in diameter), metabolically inert, infectious agent that replicates only within the cells of living hosts, mainly bacteria, plants, and animals: composed of an RNA or DNA core, a protein coat, and, in more complex types, a surrounding envelope. See more.
Computer virus - Wikipedia
A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then said to be "infected" with a computer virus. Virus writers use social engineering deceptions and exploit detailed knowledge of security vulnerabilities to initially infect systems and ...