Inflammation of the brain and spinal cord and their meninges WordNet 3.0 & Open English WordNet

Meningoencephalitis, also known as herpes meningoencephalitis, is a medical condition that simultaneously resembles both meningitis, which is an infection or inflammation of the meninges, and encephalitis, which is an infection or inflammation of the brain tissue. Wikipedia

Central nervous system disease that involves encephalitis which occurs along with meningitis Wikidata

Inflammation of the brain and the meninges. Wiktionary