Picornaviridae
noun plural
Pi·cor·na·vi·ri·dae
| \ (ˌ)pē-ˌkȯr-nə-ˈvir-ə-ˌdē
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Medical Definition of Picornaviridae
: 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