In humans it seems to mediate complex emotional behavior

• A center in the cerebral hemispheres that governs the sense of smell in lower animals

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
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, ...

Wiktionary Word definitions in Wiktionary
n. (context anatomy English) The part of the brain involved with olfaction.

Wikipedia Word definitions in Wikipedia
In animal anatomy , the rhinencephalon (from the Greek, rhino = "nose", and enkephalon = "brain") or smell-brain is a part of the brain involved with olfaction . In the human brain it is rudimentary.

WordNet Word definitions in WordNet
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 ] [also: rhinencephala (pl)]