neocortex definitions

WordNet (r) 3.0 (2005)

n
1: the cortical part of the neencephalon [syn: neopallium, neocortex]

Merriam Webster's

noun Etymology: New Latin; from its being the cortex of the phylogenetically most recently developed part of the brain Date: 1909 the large 6-layered dorsal region of the cerebral cortex that is unique to mammals; broadly the mammalian cerebral cortex