Although the family name of Belcher is a prominent one in English and American history, it is actually Old French in origin. The ancestor of the Belcher family came to England from France, as part of William the Conqueror's army that came to England in the Norman Conquest of 1066 A.D.
(Microbiology) any of several viruses whose genetic specification is encoded in RNA rather than DNA and that are able to reverse the normal flow of genetic information from DNA to RNA by transcribing RNA into DNA: many retroviruses are known to cause cancer in animals.
Confidence votes 12. A retrovirus is a virus that injects RNA into the cell, the RNA then goes through reverse-transcription. It gets turned into DNA and splices with the host cells DNA. Then the cell will make more RNA and produce protien.