Wordnet 3.0
NOUN (1)
1.
the part of the brain having the most recent phylogenetic origin;
the cerebral cortex and related parts;
[syn: neencephalon, neoencephalon]
The Collaborative International Dictionary of English v.0.48:
neencephalon \ne`en*ceph"a*lon\
(n[=e]`[e^]n*s[e^]f"[.a]*l[o^]n), (Anat.)
The most recently evolved part of the brain of higher
animals. It includes the cerebral cortex and related
structures.
[PJC]
WordNet (r) 3.0 (2006):
neencephalon
n 1: the part of the brain having the most recent phylogenetic
origin; the cerebral cortex and related parts [syn:
neencephalon, neoencephalon]