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Douglas Harper's Etymology Dictionary
virion

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

Wiktionary
virion

n. (context virology English) A single individual particle of a virus (the viral equivalent of a cell).

WordNet
virion

n. (virology) a complete viral particle; nucleic acid and capsid (and a lipid envelope in some viruses)

Usage examples of "virion".

In this, as well as in its molecular weight, it resembles VP40, found in the Ebola virion membrane.

RNA is abundant in infected cells, but virion RNA is not detectable, suggesting rapid packaging of genomic RNA.

But if that were so, what was the peruvia b virion doing in his blood?

It would be a golden opportunity to study the mutagen before anyone else, to categorize the effects and pick apart the virion right down to its smallest capsid.

Each viral particle, or virion, forms a brick that pushes against the cell walls until they burst.

Curious, too, that virulence increased with length up until 1050nm, and then dropped off as virions got longer.

Her original plan had been simply to remove all the virions from the lab.

I seemed to be even smaller: to be virions spilling from a ruined cell into the busy bloodstream.

My immune system is churning out vast armies of antibodies: hosts of avenging angels to slay the demonic virions in open combat.

The fatty acid composition of viral lipids and host cell membranes would perhaps be similar, meaning I could tell in what species of host any particular virion was replicated.

There are three stages of virus infection-the particle itself, the virion.