RHINENCEPHALON
rhinencephalon, olfactory brain
(noun) a center in the cerebral hemispheres that governs the sense of smell in lower animals; in humans it seems to mediate complex emotional behavior
Source: WordNet® 3.1
Etymology
Noun
rhinencephalon (plural rhinencephala)
(anatomy) The part of the brain involved with olfaction.
Source: Wiktionary
Rhi`nen*ceph"a*lon, n.; pl. Rhinencephala. Etym: [NL., fr. Gr.
(Anat.)
Definition: The division of the brain in front of the prosencephalon,
consisting of the two olfactory lobes from which the olfactory nerves
arise.
Note: The term is sometimes used for one of the olfactory lobes, the
plural being used for the two taken together.
Source: Webster’s Unabridged Dictionary 1913 Edition