mesencephalon
Mes`en*ceph"a*lon, n. Etym: [NL. See Meso- and Encephalon.] (Anat.) Defn: The middle segment of the brain; the midbrain. Sometimes abbreviated to mesen. See Brain.
Mes`en*ceph"a*lon, n. Etym: [NL. See Meso- and Encephalon.] (Anat.) Defn: The middle segment of the brain; the midbrain. Sometimes abbreviated to mesen. See Brain.