| virucide | (noun) an agent (physical or chemical) that inactivates or destroys viruses | Synonyms: viricide |
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| virulence | (noun) extreme harmfulness (as the capacity of a microorganism to cause disease) | Synonyms: virulency |
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| (noun) extreme hostility | Synonyms: virulency |
| virulency | (noun) extreme harmfulness (as the capacity of a microorganism to cause disease) | Synonyms: virulence |
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| (noun) extreme hostility | Synonyms: virulence |
| virus | (noun) (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 | - |
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| (noun) a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer | Synonyms: computer virus |
| (noun) a harmful or corrupting agency | - |
| virusoid | (noun) the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat | Synonyms: viroid |
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