Pronunciation: (nē"en-sef'u-lon", -lun), [key]
—pl. -lons, -laPronunciation: (-lu). [key]
the more recent part of the brain in the evolutionary development of animals, including the cerebral cortex and its related structures. Also,neoencephalon.Cf. paleencephalon.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.