: a lentivirus (species Human immunodeficiency virus 2) that causes AIDS especially in western Africa, is closely related in structure to SIV of monkeys, and is less virulent than HIV-1

Word History

First Known Use

1986, in the meaning defined above

Time Traveler
The first known use of HIV-2 was in 1986

Dictionary Entries Near HIV-2

Cite this Entry

“HIV-2.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/HIV-2. Accessed 27 Jan. 2023.

Medical Definition

HIV-2

noun
: a retrovirus of the genus Lentivirus (species Human immunodeficiency virus 2) that causes AIDS especially in West Africa, that is closely related in structure to SIV of monkeys and may have crossed over to humans, and that is less virulent and has a longer incubation period than HIV-1
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