s, ree-oh-vahy-]
| any large virus of the family Reoviridae, having double-stranded RNA and a polyhedral capsid, including those causing infantile gastroenteritis. |

reovirus re·o·vi·rus (rē'ō-vī'rəs)
n.
Any member of the genus Reovirus.
Reovirus n.
A genus of viruses that contain double-stranded RNA and are associated with various diseases in animals, including human respiratory and gastrointestinal infections.