rhinencephalon

rhinencephalon
    n 1: a center in the cerebral hemispheres that governs the sense
         of smell in lower animals; in humans it seems to mediate
         complex emotional behavior [syn: {rhinencephalon},
         {olfactory brain}]
    

Rhinencephalon \Rhi`nen*ceph"a*lon\
   (r[imac]`n[e^]n*s[e^]f"[.a]*l[o^]n), n.; pl. {Rhinencephala}
   (r[imac]`n[e^]n*s[e^]f"[.a]*l[.a]). [NL., fr. Gr. "ri`s,
   "rino`s, the nose + 'egke`falos the brain.] (Anat.)
   The division of the brain in front of the prosencephalon,
   consisting of the two olfactory lobes from which the
   olfactory nerves arise.
   [1913 Webster]

   Note: The term is sometimes used for one of the olfactory
         lobes, the plural being used for the two taken
         together.
         [1913 Webster]