HIV-2
noun
ˌāch-ˌī-ˈvē-ˈtü 
: 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
Medical Definition
HIV-2
noun
-ˈtü
: 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