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virion

[vahy-ree-on, vir-ee-] /ˈvaɪ riˌɒn, ˈvɪr i-/
noun
1.
the infectious form of a virus as it exists outside the host cell, consisting of a nucleic acid core, a protein coat, and, in some species, an external envelope.
Origin
< French virion (1959), equivalent to viri(en) viral (see virus, -ian) + -on -on1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for virion

virion

/ˈvaɪrɪən/
noun
1.
a virus in infective form, consisting of an RNA particle within a protein covering
Word Origin
C20: from vir(us) + ion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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virion in Medicine

virion vi·ri·on (vī'rē-ŏn', vēr'ē-)
n.
A complete viral particle, consisting of RNA or DNA surrounded by a protein shell and constituting the infective form of a virus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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virion in Science
virion
  (vī'rē-ŏn', vîr'ē-)   
A complete viral particle, consisting of RNA or DNA surrounded by a protein shell and constituting the infective form of a virus. The shell, called a capsid, protects the interior core that includes the genome and other proteins. After the virion binds to the surface of a specific host cell, its DNA or RNA is injected into the host cell and viral replication occurs with eventual spread of the infection to other host cells.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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