Noun
English Wikipedia has an article on:RNA virusWikipedia
RNA virus (plural RNA viruses)
Any of many viruses that possess ribonucleic acid as their genetic material and do not replicate using DNA
Cause The mumps virus is an enveloped single-stranded, linear negative-sense RNA virus of the Rubulavirus genus and Paramyxovirus family. Source: Internet
RNA virus genomes (the + strands of which are translated as mRNA) are also commonly circularized. Source: Internet