Picornaviridae

noun plural

Pi·​cor·​na·​vi·​ri·​dae (ˌ)pē-ˌkȯr-nə-ˈvir-ə-ˌdē 

: a family of small single-stranded RNA viruses that have an icosahedral virion with no envelope and that include the causative agents of avian encephalomyelitis, encephalomyocarditis, hepatitis A, polio, foot-and-mouth disease, and hand, foot and mouth disease see coxsackievirus, echovirus, enterovirus, rhinovirus