virionn.
/ˈvɪrɪɒn/ Microbiology.
The complete, infective form that a virus has outside a host cell, with a core and a capsid.
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provirus1950
virion1959
1959 Ann. de l'Inst. Pasteur XCVII. 288 The viral infective system, the virion, may be considered as a clathrate type of compound in which the genetic component is enclosed in a coat or capsid formed of subunits or capsomeres.
1967 K. M. Smith Insect Virol. i. v The virion is, structurally and physiologically, different from any cellular organelle and from any microorganism.
1975 Sci. Amer. May 25/2 An electron micrograph of the polio~virus virion (the virus particle) reveals a sphere 17 nanometers (millionths of a millimeter) in diameter... The virion consists only of protein and the nucleic acid RNA.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021).
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n.1959