a rare, acute, often fatal disease, usually of children, characterized by neurological disorders, swelling of the brain, and enlargement of the liver: it is associated with the use of aspirin for certain viral illnesses
See Reye's syndrome in American Heritage Dictionary 4
(rīz, rāz)
noun
An acute encephalopathy characterized by fever, vomiting, fatty infiltration of the liver, disorientation, and coma, occurring mainly in children and usually following a viral infection, such as chicken pox or influenza.