Mesen

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Mesencephalon \Mes`en*ceph"a*lon\, n. [NL. See {Meso-} and
     {Encephalon}.] (Anat.)
     The middle segment of the brain; the midbrain. Sometimes
     abbreviated to {mesen}. See {Brain}.
     [1913 Webster]