Meaning of virion

vi•ri•on

Pronunciation: (vī'rē-on", vir'ē-), [key]
— n.
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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