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.
Absolutely, Just that AIDS is the current most common. retrovirus. [-vÄ«â²rÉs] Etymology: L, retro + virus. any of a family of ribonucleic acid (RNA) viruses containing the enzyme reverse transcriptase in the virion. The genetic information of the virus is stored in a molecule of single-stranded ribonucleic acid.