neopallium
noun
neo·pal·li·um
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plural neopallia\ -ē-ə
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Medical Definition of neopallium
: the phylogenetically new part of the cerebral cortex that develops from the area between the piriform lobe and the hippocampus, comprises the nonolfactory region of the cortex, and attains its maximum development in humans where it makes up the greater part of the cerebral hemisphere on each side
— called also isocortex
— compare archipallium