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Any of a small group of animal and plant viruses that appear spheroidal and contain a core of RNA. Among the best-known genera are Orthoreovirus, Orbivirus, Rotavirus, and Phytoreovirus. The first three infect animals; the last can destroy rice, corn, and other crops.
This entry comes from Encyclopædia Britannica Concise. For the full entry on reovirus, visit Britannica.com.