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Definition of RNA virus
1. Noun. Any of many viruses that possess ribonucleic acid as their genetic material and do not replicate using DNA ¹
¹ Source: wiktionary.com
Medical Definition of RNA virus
1. A group of virus's in which the core consists of RNA; a major group of animal virus's that includes the families Picornaviridae, Reoviridae, Togaviridae, Flaviviridae, Bunyaviridae, Arenaviridae, Paramyxoviridae, Retroviridae, Coronaviridae, Orthomyxoviridae, and Rhabdoviridae. Synonym: ribovirus. (05 Mar 2000)