Definition of reovirus
: any of a family (Reoviridae) 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 include many plant or animal pathogens (as the rotaviruses and the causative agent of bluetongue)
Origin and Etymology of reovirus
respiratory enteric orphan (i.e., unidentified) virus
First Known Use: 1959
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