lentivirus

noun, plural len·ti·vi·rus·es.

1. any slow virus of the genus Lentivirus, of the retrovirus family, causing brain disease in sheep and other animals.

noun

1. any of a group of slowly acting viruses that includes the human immunodeficiency virus (HIV), which causes AIDS

n.

1. A virus of the genus Lentivirus and the family Retroviridae that causes diseases with a long latent period and a slow, progressive course, as HIV.