Definitions for "Rhinencephalon"
The division of the brain in front of the prosencephalon, consisting of the two olfactory lobes from which the olfactory nerves arise.
a center in the cerebral hemispheres that governs the sense of smell in lower animals; in humans it seems to mediate complex emotional behavior
Greek rhinion = nostril, and enkephalos = brain; hence, the part of the brain concerned with smell (relatively large in lower animals).