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| vi·ri·on [ vree òn, vree òn ] (plural vi·ri·ons) |
noun |
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| Definition: |
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infectious virus: the form taken by a virus when it is outside living cells and capable of causing infection. It consists of a core of DNA or RNA surrounded by a protein coat, sometimes covered by an outer envelope.
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| [Mid-20th century. < French< virien "viral" + -on1] |
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