polioencephalitis

== English == === Etymology === (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) === Noun === polioencephalitis Any encephalitis that is restricted to the gray matter. ==== Usage notes ==== Historically, this term was applied to any inflammation of the gray matter, including poliomyelitis, rabies, and epidemic encephalitis. Some recent authors restrict the use of this term to poliomyelitis.