virion

[ vahy-ree-on, vir-ee- ]
/ ˈvaɪ riˌɒn, ˈvɪr i- /

noun

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.

Nearby words

  1. virilism,
  2. virility,
  3. virilization,
  4. virilocal,
  5. virino,
  6. virl,
  7. viro-,
  8. virogene,
  9. virogenesis,
  10. viroid

Origin of virion

< French virion (1959), equivalent to viri(en) viral (see virus, -ian) + -on -on1

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for virion

virion

/ (ˈvaɪrɪən) /

noun

a virus in infective form, consisting of an RNA particle within a protein covering

Word Origin for virion

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

Word Origin and History for virion

virion

n.

coined in French, 1959, from virus (see virus) + -on.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for virion

virion

[ vīrē-ŏn′, vîrē- ]

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.

Science definitions for virion

virion

[ vīrē-ŏn′, vîrē- ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.