MESENCEPHALON Meaning of MESENCEPHALON in English [ ˌmɛsɛn'sɛf(ə)lɒn , ˌmi:z- , -'kɛf- ]■ noun Anatomy another term for midbrain .Derivativesmesencephalic adjective OriginC19: from Gk mesos 'middle' + encephalon . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004