Medical Definition of Retroviridae
: a family of single-stranded RNA viruses that produce reverse transcriptase by means of which DNA is synthesized using their RNA as a template and incorporated into the genome of infected cells, that are often tumorigenic, and that include the foamy viruses, HIV, HTLV-I, Rous sarcoma virus, SIV, and the causative agents of avian leukosis, equine infectious anemia, ovine progressive pneumonia, and jaagsiekte—see lentivirus
Seen and Heard
What made you want to look up Retroviridae? Please tell us where you read or heard it (including the quote, if possible).