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1959, coined by U.S. medical researcher Dr. Albert B. Sabin (1906-1993), acronym for respiratory enteric orphan virus; "orphan" because it was not connected to any of the diseases it is associated with.
reovirus re·o·vi·rus (rē'ō-vī'rəs)
Any member of the genus Reovirus.
A genus of viruses that contain double-stranded RNA and are associated with various diseases in animals, including human respiratory and gastrointestinal infections.