ph: a doctorate usually based on at least 3 years graduate study and a dissertation; the highest degree awarded graduate study
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
reye's syndrome: acquired encephalopathy following acute viral infections (especially influenza or chicken pox) in young children; characterized by fever, vomiting, disorientation, coma, and fatty infiltration of the liver