| virus | | |
| n. (animal) | 1. virus | (virology) 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. |
| ~ micro-organism, microorganism | any organism of microscopic size. |
| ~ arborvirus, arbovirus | a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis. |
| ~ virion | (virology) a complete viral particle; nucleic acid and capsid (and a lipid envelope in some viruses). |
| ~ bacteriophage, phage | a virus that is parasitic (reproduces itself) in bacteria.; "phage uses the bacterium's machinery and energy to produce more phage until the bacterium is destroyed and phage is released to invade surrounding bacteria" |
| ~ plant virus | a plant pathogen that is a virus consisting of a single strand of RNA. |
| ~ animal virus | an animal pathogen that is a virus. |
| ~ slow virus | a virus that remains dormant in the body for a long time before symptoms appear.; "kuru is caused by a slow virus" |
| ~ tumor virus | a cell-free filtrate held to be a virus responsible for a specific neoplasm. |
| ~ vector | (genetics) a virus or other agent that is used to deliver DNA to a cell. |
| ~ virology | the branch of medical science that studies viruses and viral diseases. |
| ~ infectious agent, infective agent | an agent capable of producing infection. |
| ~ atrophic arthritis, rheumatoid arthritis, rheumatism | a chronic autoimmune disease with inflammation of the joints and marked deformities; something (possibly a virus) triggers an attack on the synovium by the immune system, which releases cytokines that stimulate an inflammatory reaction that can lead to the destruction of all components of the joint. |
| ~ inoculant, inoculum | a substance (a virus or toxin or immune serum) that is introduced into the body to produce or increase immunity to a particular disease. |
| n. (state) | 2. virus | a harmful or corrupting agency.; "bigotry is a virus that must not be allowed to spread"; "the virus of jealousy is latent in everyone" |
| ~ delegacy, agency, representation | the state of serving as an official and authorized delegate or agent. |
| n. (communication) | 3. computer virus, virus | a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer.; "a true virus cannot spread to another computer without human assistance" |
| ~ malevolent program | a computer program designed to have undesirable or harmful effects. |
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