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1. (n.) virion
the infectious form of a virus as it exists outside the host cell, consisting of a core of DNA or RNA, a protein coat, and, in some species, an external envelope.
Etymology: (1960–65; < F virion (1959) =viri(en) viral (see virus , -ian ) +-on -on1)
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| Definition of 'virion' |
Princeton's WordNet |
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1. (noun) virion
(virology) a complete viral particle; nucleic acid and capsid (and a lipid envelope in some viruses)
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| Definition of 'virion' |
U.S. National Library of Medicine |
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1. virion
The infective system of a virus, composed of the viral genome, a protein core, and a protein coat called a capsid, which may be naked or enclosed in a lipoprotein envelope called the peplos.
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Definitions of virion 
