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(ˌni ɛnˈsɛf əˌlɒn, -lən)

n., pl. -lons, -la (-lə).
the more recent part of the brain in the evolutionary development of animals, including the cerebral cortex and its related structures.
ne`en•ce•phal′ic (-səˈfæl ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.neencephalon - the part of the brain having the most recent phylogenetic origin; the cerebral cortex and related parts
neural structure - a structure that is part of the nervous system
brain, encephalon - that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord