A virus (from the Latin virus meaning toxin or poison) is a small infectious agent that can replicate only inside the cells of other organisms. Viruses are too small to be seen ...

A computer virus is a computer program that can copy itself [1] and infect a computer. The term "virus" is also commonly but erroneously used to refer to other types of malware ...

virus /vi·rus/ (vi´rus) [L.] a minute infectious agent which, with certain exceptions, is not resolved by the light microscope, lacks independent metabolism and is able to ...

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virus n. , pl. , -ruses . Any of various simple submicroscopic parasites of plants, animals, and bacteria that often cause disease and that consist

computer virus n. A computer program that is designed to replicate itself by copying itself into the other programs stored in a computer

virus, parasite with a noncellular structure composed mainly of nucleic acid nucleic acid, any of a group of organic substances found in the chromosomes of living cells and viruses ...

This eMedTV segment provides a wealth of information on viruses and the conditions they cause. Articles discuss individual viruses in detail, including transmission methods ...

noun. Obsolete venom, as of a snake; any of a kingdom (Virus) of prokaryotes, usually ultramicroscopic, that consist of nucleic acid, either RNA or DNA, within a case of protein ...