: a form of a virus that is integrated into the genetic material of a host cell and by replicating with it can be transmitted from one cell generation to the next without causing lysis

Word History

Etymology

New Latin

First Known Use

1949, in the meaning defined above

Time Traveler
The first known use of provirus was in 1949

Browse Nearby Words

Cite this Entry

“Provirus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/provirus. Accessed 11 Mar. 2025.

Medical Definition

: a form of a virus that is integrated into the genetic material of a host cell and by replicating with it can be transmitted from one cell generation to the next without causing lysis
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