from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of a group of viruses, many of which produce tumors, that contain RNA and reverse transcriptase, including the virus that causes AIDS.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A virus that has a genome consisting of RNA.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of a group of viruses that contain two single-strand linear RNA molecules per virion and reverse transcriptase (RNA to DNA); the virus transcribes its RNA into a cDNA provirus that is then incorporated into the host cell
From retro- (“reverse”, from its reverse direction of replication) + virus. (Wiktionary)