Home › Words › R › ribovirusribovirusribovirus · noun — an RNA virus other than a retrovirus.Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, ribovirus ranks #2,501 of 43,042 for Qualifying.EtymologyFrom ribo- + virus.nounAn RNA virus other than a retrovirusDefinitions & examples from Wiktionary (CC BY-SA 3.0).