Definition of retrovirus noun from the Oxford Advanced American Dictionary

 

retrovirus

 noun
noun
NAmE//ˈrɛtroʊˌvaɪrəs//
 
 
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any of a group of viruses that includes HIV. Retroviruses multiply by making changes to DNA. the discovery of a new retrovirus in humans a retrovirus that affected chimpanzees see also anti-retroviral
See the Oxford Advanced Learner's Dictionary entry: retrovirus