(n)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.olfactory brain
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
‖n.; pl.Rhinencephala [ 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 ]
☞ The term is sometimes used for one of the olfactory lobes, the plural being used for the two taken together. [ 1913 Webster ]