Reoviridae
noun plural
Reo·vi·ri·dae
| \ ˌrē-ō-ˈvir-ə-ˌdē
\
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Medical Definition of Reoviridae
: a family of double-stranded RNA viruses that have a virion with icosahedral structural symmetry but may appear spherical, that have a capsid with one to three concentric protein layers, and that comprise many pathogens of plants and animals including the causative agents of bluetongue and Colorado tick fever — see orbivirus, rotavirus