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virion

virion

1 9.9
A complete virus particle outside a living cell that can enter and infect it
  • noun
  • /ˈvɪr.i.ɒn/
  • Specialized
: virión
  • The spleen and lymph nodes had the highest number of virions in both monkeys.
  • intact virions

So that means it's a number of virions per air volume per radius, OK.

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Examples

  • So that means it's a number of virions per air volume per radius, OK.

  • Whole-virion monovalent vaccines may perform best in a pandemic.

    Blog text (13)
  • There are no more virions in it.

    Fiction book (1993)
  • But more specifically, if we think of virus, it'll be the virions per air volume.

  • Each viral particle or virion consists of nucleic acid, either DNA or RNA, in single or double stranded form, enclosed by a capsid.

  • In the spleen, large clusters of virions were frequently seen in areas of fibrin deposition (figure).

    Academic text (1995)
  • Free virions were frequently observed in connective tissue and were often interspersed among fibrin deposits present in the vessels.

    Academic text (1995)
  • Moreover, as many as 10^9 new HIV virions are produced in an infected individual per day, and the half-life of HIV variants is about 2 days.

    Academic text (1999)
  • Moreover, transmission electron microscopy used to examine virus morphology showed pleomorphic virions, consistent with those of paramyxoviruses (Figure 3, panel C).

    Academic text (2014)
  • The virologist explained how each virion is composed of a protein coat and genetic material.

Surface Forms

virion singular
virions plural

Morphology

virion = virus (semi-transparent) = virus + on

Formed from 'virus' with the nominal/diminutive suffix '-on'; the relation is clear but the meaning is a technical term (the complete virus particle) which is not obvious to all learners.

Etymology

The word virion comes from virus, which originally meant 'poison', plus the small ending -on that means 'little unit'. So a virion is like a 'little virus', the single, complete virus particle that is infectious outside a host cell.